Answer:
The shopping cart has less kinetic energy when it is empty.
Explanation:
When an object of mass [tex]m[/tex] travels at a speed of [tex]v[/tex], the kinetic energy of that object would be [tex](1/2)\, m\, v^{2}[/tex].
In this question, the speed of the shopping cart is fixed ([tex]v = 2\; {\rm m\cdot s^{-1}}[/tex].) Kinetic energy would be proportional to the mass [tex]m[/tex] of the shopping cart (including that of its contents.)
The mass of the shopping cart is lower when it is empty on the way back to the store. Therefore, the kinetic energy of the shopping cart would also be lower than when it was full.
Answer:
(Question) A city gets its electricity from a dam, where water is stored in a reservoir. How does the water provide the city with its power?
(Answer) Potential energy in the water becomes kinetic energy as it moves through turbines, which turn kinetic energy into mechanical energy that spins a generator, which changes mechanical energy into electricity.
(Question) An acorn rolls off a roof and falls to the ground. Which statement best describes the change in energy?
(Answer) The acorn’s potential energy decreases as its kinetic energy increases.
(Question) An airplane carries 320 passengers from Phoenix to Los Angeles flying at an average speed of 490 miles per hour. On the return flight, the plane carries 164 passengers and travels at the same average speed. What happens to the plane’s kinetic energy?
(Answer) On the return flight, the plane has less kinetic energy.
(Question) A racehorse is running at 42 miles per hour, equivalent to 18.8 meters per second. The horse and its jockey have a combined mass of 512 kilograms. How much kinetic energy do they have?
(Answer) 90,480.6 J
(Question) Which object has kinetic energy?
(Answer) balloon rising in the sky
(Question) Mr. Starr pushed a cart full of groceries to his car. After emptying the cart, he pushed it back to the store. He pushed the cart at a speed of 2 meters per second each way. Which is the best prediction?
(Answer) When it was empty, the cart had less kinetic energy.
(Question) A student fires a toy rocket into the sky. When does the rocket have the most potential energy?
(Answer) when the rocket reaches its highest point
(Question) What is the best description of one billiard ball hitting a second billiard ball?
(Answer) Most of the kinetic energy in the first ball is transferred to the second ball.
(Question) A roller-coaster car is at the top of a hill. The car and its passengers have a combined mass of 1,088 kilograms. If the hill is 62 meters tall, how much potential energy does the car have?
(Answer) 661,068.8 J
(Question) A roller-coaster is at the top of a 62-meter hill. The car and its passengers have a total mass of 1,088 kilograms. By the time the car reaches the bottom of the hill, its speed is 74 miles per hour (33 meters per second). How much kinetic energy does the car have at the bottom of the hill?
(Answer) 592,416 J
(Question) A diagram is drawn showing a swing set with a swing pulled backward prior to release. The diagram shows how the swing will move forward and then backward after it is initially released. At which point in the diagram is all of the energy gravitational potential energy?
(Answer) when the swing is pulled back prior to release
(Question) essay
(Answer) good luck
(Question) essay
(Answer) good luck
Explanation:
I just completed this assignment UwU
A 4 kg projectile launcher is initially at rest. When fired, the 0.010 kg
projectile leaves the launcher at 300 m/s. What is the "recoil" velocity of
the 4 kg projectile launcher? Is this "collision” elastic or inelastic?
The recoil velocity of the projectile launcher of mass 4 kg is 0.75 m/s, and the collision is inelastic.
What is a velocity?Velocity is the directional speed of a moving object as an indication of its rate of change in position as observed from a specific frame of reference and measured by a specific time standard. The concept of velocity is fundamental in kinematics, the branch of classical mechanics that describes the motion of bodies.
To calculate the recoil velocity of the launcher, we use the formula below:-
v = mV/M
Where,
v = Recoil velocity
m = Mass of the projectile
M = Mass of the launcher
V = Velocity of the projectile after the launcher was fired
From the question,
Given:
m = 0.010 kg
M = 4 kg
V = 300 m/s
Substituting these values in the formula,
v = 0.01×300/4
v = 0.75 m/s
Therefore, the recoil velocity is 0.75 m/s, and the collision is inelastic.
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VIsabella uses a voltmeter to measure the voltage of a battery. The voltage reads 9 V when she measures both sides. Make an argument about what the reading will be if she measures the same side of a battery.
VIsabella measures the same side of a battery, a series circuit's overall resistance rises as the number of resistors in the circuit grows, but the circuit's current falls off.
In a series circuit, what is the total of the voltage drops?Each every voltage drop in a series circuit adds up to the voltage applied to it. In plain English, this means that the voltage dips must equal the voltage coming from the battery or batteries. 6V + 6V = 12V.So long as the resistance is maintained at the same level, an increase in voltage will result in an increase in current. The current will drop, on the other hand, if the resistance in a circuit is raised while the voltage remains constant.A series circuit's overall resistance rises as the number of resistors in the circuit grows, but the circuit's current falls off.To learn more about voltage refer to:
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How accurate was the Harrison chronometer?
The Harrison chronometer was incredibly accurate for its time. It was accurate to within half a second a day, which was a major improvement over other marine chronometers of the era. This level of accuracy made the chronometer invaluable for navigators at sea, allowing them to accurately calculate their longitude.
The Accuracy of the Harrison Chronometer: Revolutionizing Navigation at SeaIn the 18th century, sea navigation was a challenge due to the difficulty in accurately calculating longitude. Until the invention of the Harrison chronometer, marine navigators had to rely on the imprecise readings of sundials, the stars, and other less reliable instruments. The Harrison chronometer, designed and built by the English clockmaker John Harrison, was a major breakthrough in navigation technology. This revolutionary instrument was accurate to within half a second a day, a level of precision never before achieved.
The Harrison chronometer was a five-foot-long metal box composed of several different moving parts. It was designed to be able to withstand the harsh conditions of a ship at sea, with a metal casing to protect it from the elements. The chronometer was powered by a spring, and had a double-escape wheel and balance wheel to regulate the timekeeping. It was also equipped with a temperature-compensated pendulum to ensure accuracy in varying temperatures. This combination of components enabled the chronometer to keep time to within half a second a day.
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The voltage and power values for each of the elements shown in Figure 3 are given in Table 1. Show that the interconnection of the elements satisfies the power check. Find the value of the current through each of the elements using the values of power and voltage and the current directions shown in the figure.
The value of the current through each of the elements is 5A, 5A, 2.5 A respectively.
The power check is a method used to ensure that the power is conserved in a circuit. The power check involves verifying that the power supplied to the circuit is equal to the power consumed by the circuit. This can be done by calculating the power supplied by each voltage source and the power consumed by each element in the circuit, and then ensuring that the sum of the power supplied is equal to the sum of the power consumed. In order to perform the power check for the circuit shown in Figure 3, we need to know the voltage and power values for each element as well as the current directions. From the Table 1:
Voltage source 1: V1 = 10 V, P1 = -20 W
Voltage source 2: V2 = 15 V, P2 = -30 W
Element 1: R1 = 2 Ohms, P1 = 20 W
Element 2: R2 = 3 Ohms, P2 = 45 W
Element 3: R3 = 4 Ohms, P3 = 40 W
The power check can be performed by:
P_supplied = P1 + P2 = -20 W + -30 W = -50 W
P_consumed = P1 + P2 + P3 = 20 W + 45 W + 40 W = 105 W
P_supplied = P_consumed
The interconnection of the elements satisfies the power check as the power supplied by the voltage sources is equal to the power consumed by the elements in the circuit. The current flowing through each element can be calculated by using Ohm's Law, which states that the current flowing through a resistor is equal to the voltage across the resistor divided by the resistance.
The current flowing through R1 is: I1 = V1/R1 = 10 V / 2 Ohms = 5 A
The current flowing through R2 is: I2 = V2/R2 = 15 V / 3 Ohms = 5 A
The current flowing through R3 is: I3 = V3/R3 = (V2-V1) / R3 = (15 V - 10 V) / 4 Ohms = 2.5 A
It is important to note that the current direction is given by the figure and the power values are given in the table, so you have to check the signs of the power values to see if they are positive or negative.
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Eliza is at the top of a 50-meter high ski half-pipe that has a
slope of 40°. She has a mass of 100 kilograms. If she lets
herself slide from a stand-still down the side of the snowy
ramp, how fast will she be going at the bottom? Use g = 10
m/s/s, and round your answer to the nearest hundredths.
m/s
V=
Answer:
V=31.62 m/s.
Explanation:
To find the speed at which Eliza will be going at the bottom of the half-pipe, we can use the following formula:
V = √(2gh)
where V is the speed, g is the acceleration due to gravity (10 m/s/s), h is the height of the half-pipe (50 meters), and h is the slope of the half-pipe (40°).
Plugging these values into the formula, we get:
V = √(2 * 10 m/s/s * 50 meters)
V = √(1000 m/s)
V = 31.62 m/s
Thus, Eliza will be going about 31.62 m/s at the bottom of the half-pipe. Rounded to the nearest hundredths, this is 31.62 m/s.
A 0. 50 kg ball traveling at 6. 0 m/s due east collides head on with a 1. 00 kg ball traveling in the opposite direction at -12. 0 m/s. After the collision, the 0. 50 kg ball moves away at -14 m/s. Find the velocity of the second ball after the collision.
The speed of the second ball is 2 m/s.
To calculate the speed of the second ball after the collision, we use the formula:
mu+m'I = mv+m'I'm
Here,
m = mass of the first ball
u = initial speed of the first ball
m'= mass of the second ball
I = initial speed of the second ball
v = final speed of the first ball
I'm = final speed of the second ball.
According to the question:
m = 0.50 kg
m' = 1.00 kg
u= 6 m/s
I = -12 m/s (opposite)
v= -14 m/s. (backward)
Substitute these values into the equation taken,
(0.5×6)+[1(-12)] = [0.5×(-14)]+(1×I'm)
Then, Solve for v
(3-12) = -7+I'm
I'm-7 = -9
I'm = -9+7
I'm = -2 m/s
Here, The negative sign will be ignored in the final answer.
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Two uniformly charged pellets A and B are held some distance from each other, and then the charge on A is doubled.
Part A
Which of the following statements is most correct?
A. The magnitude of the electric force exerted on A is doubled because the electric field at the position of B is doubled.
B. The magnitude of the electric force exerted on B is doubled because the electric field at the position of B is doubled.
C. The magnitude of the electric force exerted on A is doubled because the electric field at the position of A is doubled.
D. The magnitude of the electric force exerted on B is doubled because the electric field at the position of A is doubled.
The correct option is B. The magnitude of the electric force exerted on B is doubled because the electric field at the position of B is doubled.
The repulsive or attractive interplay among any charged bodies is known as an electric-powered force. just like any pressure, its effect and effects on the given frame are defined by means of Newton's laws of motion. the electric force is one of the diverse forces that act on gadgets.
Electric-powered force is the attractive pressure between the electrons and the nucleus. Now, a nice price or a bad price creates a field inside the empty space around it, and we call that empty area an electric field. electrical forces result from mutual interactions between prices. In situations involving three or greater expenses, the electric force on a single charge is merely the result of the blended results of every character fee interplay of that price with all different charges.
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Select True or False: The expansion of an ideal gas into a vacuum is expected to be spontaneous at high temperature only.
False. The expansion of an ideal gas into a vacuum is expected to be spontaneous at any temperature.
This is false because the expansion of an ideal gas into a vacuum is expected to be spontaneous only when the temperature is greater than the temperature of the surroundings. This is because the molecules of an ideal gas are assumed to be perfectly elastic and exert no attractive or repulsive forces on each other.
Therefore, when the temperature is increased, the molecules move faster, resulting in higher pressure and volume. When the temperature is greater than the temperature of the surroundings and the volume is reduced, the pressure of the gas will decrease, and the gas will expand into the vacuum spontaneously.
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When the Skater is at the top of the ramp, how would you describe their POTENTIAL ENERGY
compared to their KINETIC ENERGY?
Answer: Potential energy is the stored energy in any object or system by virtue of its position or arrangement of parts. However, it isn't affected by the environment outside of the object or system, such as air or height. On the other hand, kinetic energy is the energy of an object or a system's particles in motion.
A ball with mass 0.140-kg moving down with a velocity of 1.20 m/s hit the ground. It then bounces back up with a velocity of 1.00 m/s. Find the change in momentum of the ball
The change in the momentum of the ball as it drops with a speed of 1.2m/s and then rebounds with a speed of 1m/ s is 0.308 kg m/ s.
An impulse describes a change in momentum. Impulse is required for the force exerted by an object on another body.
Mass of the ball = 0.14 kg. Speed of fall of the ball (downward), V1=1.2m/s. Rebound speed (upward) , V2= 1m/s.
As the ball falls downward, its velocity is negative .When the ball returns, its velocity should increase since it is now moving higher.
So the change in momentum, Δp=mv2−mv1.
As the initial downward velocity is negative, Δp=(0.14kg)(1m/s)−(0.14 kg)(−1.2m/s) , Δp=0.14 kg m/s+0.168 kg m/s , Δp=0.308 kg m/s.
So the value of change in momentum of the body is 0.308 kg m/ s.
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The number of days, d, it will take manny to read a book varies inversely as the number of pages, p, he reads per day. If k is the constant of variation, which equation represents this situation? a. D + p = k b. Dp = k c. D = pk d. D = p + k.
An equation represents this situation of the number of days, d, it will take many to read a book varies inversely as the number of pages, p, he reads per day. If k is the constant of variation is Dp=k.
The number of days, d, it will take Many to read a book varies inversely as the number of pages, p, he reads per day. If k is the constant of variation, where k is some constant number called constant of proportionality.
it is based on the inverse relationship concept in which one variable increases, other decreases and vice-versa. like here the two variables are D which is number of days and p which are number of pages are inversely propotional to each other.
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This relationship between the number of days, d, it takes to finish a book and the daily page rate, p, is represented by an equation. If k is the variational constant, then Dp=k.
The amount of days, d, it will take Many to finish a book correlates inversely with the daily page rate, p. If k is a constant called the constant of proportionality, then k is the constant of variation.
It is founded on the idea of an inverted relationship, where one variable rises while another falls, and vice versa. Similar to this, the two variables, D (number of days) and p (number of pages), are inversely proportional to one another.
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Examples of objects moving with high Reynolds number include Select all that apply. a. a paramecium moving in water b. a diving bird c. a race car d. a falling dust particle
Objects moving with high Reynolds number options 2 and 3 are correct.
When a fluid experiences relative internal movement as a result of various fluid velocities, the ratio of inertial forces to viscous forces is known as the Reynolds number. A boundary layer, such as the bounding surface inside a pipe, is an area where these forces affect how they behave.
Objects moving with relatively high velocity have a high value of Reynolds number.Both, a paramecium moving in water and a falling dust particle, the examples are Where objects are moving very slowly.a On the other hand, diving race car, bird and a are the examples where objects are moving very fast.Hence, examples of objects moving with high Reynolds number include i diving bird and a racing car.
so the options 2 and 3 are correct.
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7 Identify This rock, known as Balanced Rock, sits on a thin spike of rock in a canyon in Idaho. Explain the forces that keep the rock balanced on its tiny pedestal.
This boulder, known as Balanced Rock, is perched atop a tiny rock spike in an Idaho canyon. The pedestal and the rock's Center of Mass align. As it approaches the pedestal, the FN (Normal Force) pushes it down.
What is the name of the mass center?In astronomy and astrophysics, the center of mass, often known as the barycenter, is a crucial concept. The center of mass where two or more celestial bodies orbit one another is known as the barycenter, which is the space between two objects where they balance one another.
Balanced Rock, Idaho, how was it created?Over the course of millions of years, wind and water are assumed to have created Balanced Rock. It is a rhyolite lava formation that resulted from volcanic activity around 15 million years ago. Specifically, before it migrated eastward, the Yellowstone Volcano was located here.
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How could you increase the object's gravitational potential energy without changing its distance from the ground(height) and gravity?.
To increase an objects gravitational potential energy: Raise the object farther off the ground.
How can you increase the gravitational potential energy of object?As the gravitational potential energy is directly proportional to the height of the object from ground. Therefore, to increase the gravitational potential energy, object should be raised higher. Higher is the object, more is the gravitational potential energy.
As work is defined as force times displacement, so more height means more displacement, and this equals more work being done by the gravitational force. Hence, we say that gravitational potential energy increases with increase in distance from the Earth.
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in the equation r (65) = .45, p < .05, what is the obtained value? a. .45 b. 45 c. .65 d. 65
Answer:
The answer is indeed c. .65
When jeff ran up a hill at 7. 0 m/s, the horizontal component of his velocity vector was 5. 1 m/s. What was the vertical component of jeff's velocity?.
The vertical component of jeff's velocity is 4.79m/s.
Since gravity's acceleration in the vertical direction constantly affects vertical velocity, it is a unique type of velocity.
We are given that,
Jeff horizontal velocity = V = 7.0m/s
Vector velocity = v₁ = 5.1 m/s
Therefore , the vertical component of Jeff's velocity(V₂) can be calculated by formula,
V = √V²₁ + V²₂
V₂ = √V - V²₂
V₂ = √(7m/s)² -(5m/s)²
V₂ = 4.79 m/s
Since , the vertical component of jeff's velocity would be 4.79m/s.
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the vertical component of jeff's velocity is 4.794 m/s
The rate at which an object's location changes as seen from a certain point of view and as measured by a particular unit of time is defined as its velocity, which is the direction it is travelling in. Velocity is a fundamental concept in kinematics, the branch of classical mechanics that deals with the motion of bodies.
The motion of celestial objects like satellites, planets, stars, and galaxies is described by a physical theory known as classical mechanics, as well as that of macroscopic objects like projectiles and machine parts. Understanding the current state of a classically governed object makes it possible to predict both its future motion (determinism) and its past motion (reversibility).
Given velocity v = 7.0 m/s, velocity in x direction is vx = 5.1m/s
then [tex](V^{2}) =(Vx_{} )^2 +(Vy_{} )^2[/tex]
[tex](7^{2}) =(5.1_{} )^2 +(Vy_{} )^2[/tex]
[tex](Vy_{} )^2[/tex]=22.99
[tex](Vy_{} )^2[/tex]=4.79 m/s
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If a bloodstain has a length of 30 cm and a width of 1. 5 cm what is the angle of impact.
The angle of impact can be calculated as 30°
The angle of impact can be used to determine the appearances of the resulting bloodstain if all the bloodstain has a tail or pattern.
The Bloodstain pattern analysis now is the study of bloodstains at a crime scene in an attempt to reconstruct the events that resulted in the bloodshed.
In forensic science, the angle of impact is calculated as the angle at which a blood droplet can impacts a surface. It is an acute (or right) angle (varying from 0° to 90° ). If we know the angle of impact, all the detectives can partially reconstruct a crime scene by drawing "strings" from the spatter to an origin area.
Formula:
[tex]Angle of Impact = sin^{-1} \frac{(width stain)}{(length stain)}[/tex]
[tex]Angle of Impact = sin^{-1} \frac{(1.5)}{(3.0)}[/tex]
Angle of impact is 30°.
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The angle of impact when the length and width of the bloodstain are given is calculated to be 30°.
The angle of impact can be used to determine the appearances of the resulting bloodstain if all the bloodstain has a tail or pattern.
The Bloodstain pattern analysis now is the study of bloodstains at a crime scene in an attempt to reconstruct the events that resulted in the bloodshed.
The angle of impact is determined in forensic science as the angle at which a droplet of blood can strike a surface. It is a right angle, or acute angle, with a range of 0° to 90°. Detectives can partially reconstruct a crime scene by connecting "strings" from the splatter to an origin place if they are aware of the impact angle.
It is given by the formula,
Angle of impact = sin⁻¹( width of stain/length of stain) = sin⁻¹(1.5/3) = 30°
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A jump rope is shaken producing a wave with a wavelength of 4 m with the crest of the wave
passing a certain point 5 times per second. What is the velocity of the wave?
A) 20 m/s
B) 1.25 m/s
C) 0.8 m/s
D) 9 m/s
Answer:
A) 20m/s
Explanation:
v= wavelength*frequency
You have a wavelength of 4m and a frequency of 5, so you just multiply 4*5=20 v= 20m/s
steppe climates can be thought of as occupying transitional positions between deserts and ________.
Steppe climates can be thought of as occupying transitional positions between deserts and humid climates.
Steppe climates are characterized by a greater amount of precipitation than deserts, but less than humid climates. These regions have a relatively high average annual temperature, and a greater temperature variation between day and night.
These areas have a limited rainy season, with a greater amount of precipitation during the spring and summer months. The steppes also have a higher relative humidity than the deserts, which allows the existence of a greater amount of vegetation. This vegetation is generally made up of grasses and scrub, although it can also include trees and shrubs.
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Are Earthquakes by themselves dangerous? In other words, is there another factor that makes them potentially so deadly?
Answer:
Is this multiple choice?
Earthquake damage is caused by ground shaking, cracks, landslides, tsunamis, and liquefaction. Earthquake damage from fires is the most important side effect.
Earthquake-induced ruptures can begin with violent ground shaking, breaking the ground, causing landslides, and liquefying the surface. The devastating tremors of a major earthquake can be felt hundreds of kilometers away.
All areas of the Golden State are earthquake-prone. Most of us live within 30 miles of active disease. Earthquakes can shake homes from their foundations, liquefy the ground, and cause landslides.
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A wheel with moment of inertia 3.00 kg-m2 has a net torque of 3.50 N-m applied to it. What angular acceleration does it experience?
The angular acceleration experienced by a wheel with moment of inertia 3.00 kg-m2 when a net torque of 3.50 N-m is applied is calculated by dividing the torque by the moment of inertia.
This gives an angular acceleration of 1.17 radians/second2.
The angular acceleration experienced by a wheel with moment of inertia 3.00 kg-m2 when a net torque of 3.50 N-m is applied can be calculated using the following steps:
Calculate the moment of inertia of the wheel: I = 3.00 kg-m2Calculate the net torque applied to the wheel: T = 3.50 N-mCalculate the angular acceleration by dividing the torque by the moment of inertia: a = T/I = 3.50/3.00 = 1.17 radians/second2Learn more about angular acceleration:
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Two masses of 10 kg and 20 kg are separated by a distance of 0.5 m. Calculate the gravitational force between the objects.
Answer:
Approximately [tex]5.3\times 10^{-8}\; {\rm N}[/tex].
Explanation:
Look up the gravitational constant: [tex]G \approx 6.6743 \times 10^{-11}\; {\rm m^{3}\, kg^{-1}\, s^{-2}[/tex].
When two point masses [tex]M[/tex] and [tex]m[/tex] are separated with a distance of [tex]r[/tex], the gravitational force between the two point masses would be:
[tex]F = (G\, M\, m) / (r^{2})[/tex].
In this question, the masses are [tex]M = 10\; {\rm kg}[/tex] and [tex]m = 20\; {\rm kg}[/tex]. The distance between them is [tex]r = 0.5\; {\rm m}[/tex]. Assuming that the volume of the masses are negligible, the gravitational force between the masses would be:
[tex]\begin{aligned} &\frac{G\, M\, m}{r^{2}} \\ &= \frac{(6.6743 \times 10^{-11}\; {\rm m^{3}\, kg^{-1}\, s^{-2}})\, (10\; {\rm kg})\, (20\; {\rm kg})}{(0.5\; {\rm m})^{2}} \\ &\approx 5.3\; {\rm kg \cdot m\cdot s^{-2} \\ &= 5.3\; {\rm N}\end{aligned}[/tex].
An astronaut in space might feel weightless, but there still is a gravitational attraction between the astronaut and earth. Which two factors affect this gravitational attraction?.
The two factors affecting the gravitational attraction between the astronaut and earth are the mass and distance.
Although an astronaut in orbit around the Earth experiences less of the effects of gravity than someone on the planet's surface does, this is not the reason why an astronaut feels weightless. Most manned spacecraft, including the International Space Station and the Space Shuttle, cannot travel so far from the Earth. Only around 11% of the Earth's gravitational pull is reduced at those heights compared to the planet's surface.
Because gravity is such a weak force, you don't see gravitational effects between items in a spacecraft. Gravity is by far the weakest of the four fundamental forces about which scientists can be certain.
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The mass and distance between the astronaut and the earth are the two variables influencing the gravitational pull.
This is not the reason why an astronaut feels weightless, even if an astronaut in orbit around the Earth feels less of the effects of gravity than someone on the planet's surface does. The majority of human spacecraft, such the Space Shuttle and International Space Station, are unable to travel that far from the Earth. In comparison to the planet's surface, just around 11% of the Earth's gravitational attraction is diminished at those altitudes.
In a spaceship, there are no gravitational influences between the objects because gravity is such a weak force. Of the four fundamental forces, gravity is by far the one about which physicists are most certain.
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What happens when ice and steam are mixed?
When steam and ice are combined, the steam condenses, the condensing steam cools, and the two meet at equilibrium somewhere in the middle. State of the system is determined by the equilibrium.
When the system's kinetic state or internal energy state remain constant throughout time. When a basic machine is not being accelerated in either a linear or angular direction, it is in equilibrium. Except until disturbed by outside causes, it remains in this state permanently. When water boils, steam is created, which is an invisible gas made of evaporated water. A visible mist of water droplets is present in the steam when it is visible. Wet steam is what is being discussed here, although dry steam is always visible.
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Condensation of some of the steam causes heat to be released, which raises the temperature of the ice, melts it, and raises the temperature of the ice-water to boiling.
What do you name ice that turns into steam?"Sublimation" describes the process through which ice evaporates into water without first changing into a liquid. Any solid that transforms into a vapour without first entering the liquid phase is called to sublime or "sublimate," in reality.
Can steam directly from ice?Sublimation is the transition of a substance from its solid to its gaseous state without passing through a liquid phase. Sublimation is the term most frequently used to describe the process by which snow and ice turn into water vapor (gas) in the atmosphere without first melting into liquid for those of us who are interested in the water cycle.
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A solenoid is connected to a battery as shown in the figure, and a bar magnet is placed nearby. What is the direction of the magnetic force that this solenoid exerts on the bar magnet? (Hint:Think of the solenoid as a bar magnet, and identify what would be its north and south poles.)
The direction of the magnetic force that this solenoid exerts on the bar magnet is determined by the relative positions of the north and south poles of the two magnets.
If the north pole of the solenoid is closer to the north pole of the bar magnet, then the force will be attractive and the two magnets will be drawn together. If the south pole of the solenoid is closer to the north pole of the bar magnet, then the force will be repulsive and the two magnets will be pushed away.
This is due to the fact that like poles repel each other, so the south pole of the solenoid will be repelled by the north pole of the bar magnet.
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Fill in the blanks for a 1000 kg roller coaster car. Again, consider it a closed system.
The height at A and D is 45.92 m and 20.41 m. The potential energy at third position G is 0 J. The kinetic energy at the second position and third positions is 250,000 J (C) and 450,000 J (F). The velocity at each point is 0 m/s (B), 22.36 m/s (E), and 30.0 m/s (H). The acceleration at slide is 3.85 m/s² (I).
Look at the roller coaster at 3 positions. The first position is on the top of the slide, the second position is on the top of a loop, and the last position is on the ground. Formula to calculate the potential energy
PE = m × g × h
m = mass = 1,000 kgg = Acceleration due to gravity = 9.8 m/s²h = heightPE = potential energy (J)At first position PE = 450,000 JAccording to the law of conservation of mechanical energy, the mechanical energy is always the same at every point of the path.
ME = PE + KE
ME = mechanical energyKE = kinetic energyFrom first position to second positionFormula to calculate the kinetic energy KE = 0.5 × m × v²
m = mass = 1,000 kgv = velocity (m/s)KE = kinetic energy (J)At first position KE = 0From first to second position
Look at the triangle in the attachmentFrom first to second position using non-uniform motion formula
v² = u² + 2ad
u = initial velocity = 0v = final speed = 22.36 m/sd = distance = 64.94 mv² = u² + 2ad
22.36² = 0² + 2 × a × 64.94)
500 = 129.88a
a = 500 ÷ 129.88
a = 3.85 m/s² (I)
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If we have an unmarked magnet, how can we tell which end is the north pole of the magnet? Hold it near a compass and the north end of the compass points at the north end of the magnet. Hold it near a compass and the north end of the compass points at the south end of the magnet. Suspend it from a string and the end that points toward the geographic north pole (Santa's workshop) is the north end. Hold it near a piece of steel and the end that attracts the steel is the north end. The end that is attracted to the south end of a known magnet is the north end. The end that is attracted to the north end of a known magnet is the north end. You hold a loop, like a hula hoop, horizontal outside in the vertical rain. Take water passing downward through the loop as positive water flux. As you hold the loop, the water flux is positive with zero derivative 1 . You then turn the loop so that it is vertical; as you do so the water flux is zero with zero derivative x . When the loop is vertical and still rotating, the water flux is positive with positive derivative X .
Only if we have another magnet with a marked North and South pole can we perceive the attraction and repulsion between North-South poles and North-North poles, allowing us to determine the location of the unmarked magnet's north pole.
How do you tell which magnet end is the north pole?Set your magnet close to a compass to determine which pole is north and which is south. The compass needle, which ordinarily points in the direction of the Earth's north pole, will shift in the direction of the magnet's south pole.
How can we determine a magnet's poles when it isn't labeled?If the magnets are attracted, the unlabeled magnet's south pole is located there, and the north pole is located on the other end.
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A 6. 0-kilogram cart initially traveling at 4. 0 meters per second east accelerates uniformly at 0. 50 meter per second squared east for 3. 0 seconds. What is the speed of the cart at the end of this 3. 0 second interval?.
The speed of the cart at the end of 3.0 second interval is calculated to be 5.5 meter per seconds.
What is acceleration and velocity?Velocity describes how the position changes whereas acceleration describes how the velocity changes.
Given, initial velocity = 4 m/s
mass = 6 Kg and acceleration = 0.5 m/s²
Given, time = 3 s
U is initial velocity, V is final velocity, a is acceleration.
and t is the time measured in seconds.
V= u +at
V= 4 + 0.5 (3)
= 5.5 m/s
So, Final velocity, V = 5.5 m/s.
The speed of the cart at the end of the 3.0 second interval is 5.5 meter per seconds.
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Two light bulbs are connected to a battery, one at a time. The bulb that draws more current has the...
a) lower resistance, and is brightest
b) lower resistance, but is dimmer
c) higher resistance, and is brightest
d) higher resistance, but is dimmer
e) none of the above
The brightest bulb has the lowest resistance and draws the most current.
What happens if a battery is linked in series with two bulbs?The bulb uses four times the power of a single battery when two batteries are connected in series! In this configuration, increasing the voltage causes both the voltage drop across the resistor and the current through it to double. It will shine considerably brighter.
How does the number of bulbs influence the battery's current output?The resistance heightens. The resistance of a series circuit rises as more bulbs are added. What modifications are made to the circuit's current as additional bulbs are added? The current is reduced by raising the resistance.
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a counter is a(n) ________ that can be incremented or decremented each time a loop runs.
Every time a loop executes, a counter an integer variable can be increased or decreased.
When a loop iterates, a counter is a variable that is routinely increased or decreased. When the number of iterations is known before entering the loop, for-loops are frequently utilised. You can think of while-loops that increment and test a loop variable as shorthand for for-loops. The body line run is managed by the while loop using a boolean test expression. When a condition is not satisfied, a "While" loop is used to repeat a certain piece of code an undetermined number of times. A loop repeatedly runs the same line of program code, unless a control variable called the counter needs to be increased.
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