Answer:
A. −1.11 m/s2
Explanation:
To calculate the object's acceleration, we can say:
acceleration = (final velocity - initial velocity) / time
The object's initial velocity is 120 m/s, its final velocity is 20 m/s, and the time it takes to travel the 2,500-meter path is 1.5 minutes, or 90 seconds (1.5 x 60 = 90).
Therefore:
acceleration = (20 m/s - 120 m/s) / 90 s = -1.11 m/s^2
Note
The negative sign, means the object is decelerating and not accelerating because the object is slowing down during the trip.
it is decreasing its speed as it travels, so it's slowing down over time. The absolute value of -1.11 is also called deceleration.#SPJ4
If the partial pressure of the diatomic gas is 0. 720 atm, what is the total pressure?.
If the partial pressure of the diatomic gas is 0. 720 atm, 2.57 atm is the total pressure.
The partial pressure formula: what is it?The physiological effects of the various breathing gas components are dependent on partial pressure when diving underwater. Partial pressure is computed using diving terminology as follows: partial pressure = (total absolute pressure) (volume fraction of gas component)
The partial pressure in a mixture of gases is the amount of pressure that each gas would exert if it were the only gas present in the volume, or we may define it as the pressure that each component of the mixture of gases exerts.
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Momentum, Impulse & Conservation of Momentum While playing pool, the white cue ball strikes the 8 ball. Before the collision, the cue ball's velocity was 12 m/s and the 8 ball was at rest. If both ball's have a mass of 0.12 kg and the cue ball's velocity after the collision is 4 m/s, what is the 8 ball's velocity?O 8 m/s O 1.5 m's O 2 m/sO 0-2 m/s
The 8 ball's velocity equals 2 m/s if both balls have a mass of 0.12 kg and the cue ball's velocity is 4 m/s after the collision.
When the ball strikes the white ball, what will happen to its momentum?
Momentum will remain constant regardless of the impact type. This implies that the overall momentum of all colliding objects prior to the collision will match the total momentum following the collision.
How is momentum conservation used in the game of pool?
All of the balls' momentum, which is the sum of their mass and velocity, must be preserved upon each contact. To put it another way, the overall momentum before and after the contact must be equal.
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A barge is 10. 0 m wide and 60. 0 m long and has vertical sides. It is floating in fresh water. A load of 6. 00 mn is placed on the barge. How much does its hull sink into the water?.
A barge has vertical sides and measures 60 meters long by 10 meters wide. In fresh water, it is afloat. 6.00 million pounds are loaded onto the barge. The boat's hull does 50 cm sink into in the water.
What is water that is fresh?Freshwater is defined as water with less over 1,000 milligrams of dissolved particles per liter, most frequently salt. Earth's surface water bodies are typically seen as renewable resources because they are a form of water.
What are the top three freshwater facts?The amount of fresh water on earth is 3%. 2.5% of the fresh water on earth is unavailable because it is highly polluted and trapped in ice, arctic ice caps, the ionosphere, and soil.
let it be h,
=V*d*g
=10*60*h*1000*g
10*60*h*1000*g = 300000*g
h=.5 m
=50 cm
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How much heat will be absorbed by 1 mole of an ideal gas?
The amount of heat absorbed by 1 mole of an ideal gas will be 207 J
Whenever heated under constant pressure, one mole of such an ideal gas needs 207 J of heat to increase its temperature through 10K.
Whenever the pressure would be expressed in kPa, the ideal gas constant has been determined to be 8.314J/Kmol. The pressure, volume, temperature, as well as amount of moles of such an ideal gas are all related by a single equation known as the ideal gas law. The combined gas law connects a gas's volume, pressure, as well as temperature.
The "gas constant" would be the value "R" in the ideal gas law equation. R = PV. nT. A constant number will always be equal to the pressure times the quantity of a gas dividing by that of the moles as well as the temperature of the gas.
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Suppose you have a 120-kg wooden crate resting on a wood floor. (a) What maximum force can you exert horizontally on the crate without moving it
The maximum force that we can exert horizontally on the crate without moving is 588 N. The result is obtained by using the Newton's first law.
What is Newton's first law?Newton's first law states that every object will remain at rest or keep constantly moving in a straight line unless an external force acts upon it.
The equation of Newton's first law can be expressed as
∑F = 0
We have a 120-kg wooden crate resting on a wood floor. Find the maximum force that you can exert horizontally on the crate without moving it!
See the illustration picture in the attachment!
The maximum force will be
∑Fx = 0
F - fs = 0
F = fs
The friction force has the opposite direction with the force exerted.
This is the product of the coefficient of static friction and normal force.
The normal force is
∑Fy = 0
Fn - W = 0
Fn - mg = 0
Fn = mg
Fn = 120 × 9.8
Fn = 1,176 N
From the scientific data, the highest value of coefficient of static friction of wood on wood is 0.5. Let's use it to find the friction force (fs).
fs = μs × Fn
fs = 0.5 × 1,176
fs = 588 N
F = fs = 588 N
Hence, we can exert the maximum force of 588 N horizontally on the crate without moving.
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I throw a ball with a mass of 0.5 kg at a box with a mass of 10kg. The ball is moving at a velocity of 10 m/s. After the collision, the ball is trapped inside the box and both objects are moving at the same velocity. What is that velocity
Answer:
5 m/s
Explanation:
This can be determined by using the conservation of momentum, which states that the final momentum must be equal to the initial momentum, P = mv, where m is the mass and v is the velocity. The total initial momentum of the system is 10 kg x 10 m/s = 100 kg m/s. According to the conservation of momentum, the total final momentum must also be 100 kg m/s. The total final mass is 10.5 kg, so the final velocity must be 100 ÷ 10.5 = 5 m/s.
Which planet orbits the Sun in 365 days?
Answer:
Earth
Explanation:
The figure(Figure 1) is a graph of Ex. The potential at the origin is 0 V .
E (V/m) 200 100 x (m) 01
What is the potential at x=3.0m ?
Express your answer using two significant figures.
According to the graph. the potential at x=3.0m is 0V.
A physical field called an electric field surrounds electrically charged particles and attracts or repels all other charged particles nearby. It also refers to the physical field of a system of charged particles.
Electric fields are composed of electric charges and time-varying electric currents.
The electric potential at x=3.0m = initial potential energy + electric field× distance
= 0 Volt + 0 Volt/meter×3 meter
= 0 Volt.
The graph demonstrates that the potential declines linearly with increasing distance from the origin, demonstrating a consistent strength of the field. In addition, the graph demonstrates that the potential at any given distance is equal to the potential at the origin (the y-intercept) less the sum of the distance and the field strength.
Therefore, The potential at the origin is 0 V, so the potential at x=3.0m is 0 V.
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Mg(OH)2
How many different elements
What is the best method commonly used to detect Earth-sized extrasolar planets with the telescopes and instrumentation that exist today
The best method commonly used to detect Earth-sized extrasolar planets with the telescopes and instrumentation that exist today is called the radial velocity method.
Detecting Earth-Sized Extrasolar Planets Using the Radial Velocity MethodThe radial velocity method works by measuring the Doppler shift of the star's light due to the star's motion in its orbit around the center of mass of the star-planet system. As the star moves towards us, the wavelength of its light is compressed, shifting its spectral lines towards the blue end of the spectrum. Conversely, when the star moves away from us, the light is stretched, shifting its spectral lines towards the red end of the spectrum. By measuring these tiny shifts in the wavelength of the star's light over time, it is possible to detect the presence of an orbiting planet.
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An object starts from rest and has an acceleration of 2.0 ms−2. What is the speed (v = at) of the object after 7.00 seconds with the correct number of significant digits?
Answer:
14 m/s
Explanation:
Correct number of sig dig will be two since accel has only two SD ( you can only have as many SD as the factor with the LEAST SD)
v = at
= 2 m/s^2 * 7 s = 14 m/s
A force of 35.0 N is required to start a 6.0-kg box moving across a horizontal concrete floor. Part A What is the coefficient of static friction between the box and the floor? Express your answer using two significant figures. ?s = SubmitGive Up Part B If the 35.0-N force continues, the box accelerates at 0.44 m/s2 . What is the coefficient of kinetic friction? Express your answer using two significant figures. ?k =
The coefficient of kinetic friction turns out to be 0.534 whereas the coefficient of static friction is 0.595.
(a) mass = m = 6 kg
g = 9.81 m/s^2
F = k m g
k = F / m g = 35 / ( 6 * 9.81 ) = 0.595
What exactly are static and kinetic friction?The box can't move on its own because of static friction; this friction must be overcome by an opposing force that is strong enough for the box to move. When surfaces are moving, a force called kinetic friction, also known as dynamic friction, opposes the relative movement of the surfaces.
What is static friction, exactly?A force that holds an item at rest is called static friction. The friction that people experience when attempting to move a stationary object on a surface without actually causing any relative motion between the body and the surface is defined as:
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A 745 kg race car experiences an applied force from the engine of 38900 N and a frictional force of 34000 N. How long does it take to go from rest to 21 m/s ?
The time taken for the car to go from rest to 21 m/s is 3.2 seconds.
What is the acceleration of the car?The acceleration of the car is determined by applying Newton's second law of motion as shown below.
Mathematically, the formula for Newton's second law of motion is given as;
F (net) = ma
where;
m is the mass of the cara is the acceleration of the carThe net force acting on the car is calculated as follows;
F (net) = F - Ff
where;
F is the applied forceFf is the force of frictionF (net) = 38,900 N - 34,000 N
F (net) = 4,900 N
The acceleration of the car is calculated as follows;
a = F (net) / m
a = ( 4,900 N ) / ( 745 kg )
a = 6.58 m/s²
The time of motion of the car is calculated as follows;
v = u + at
v = 0 + at
v = at
t = v / a
t = ( 21 m/s ) / ( 6.58 m/s² )
t = 3.2 s
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How did Harrison get around the temperature problem?
John Harrison constructed his first pendulum clock using a wooden wheel movement, which was followed by the first important invention to account for pendulum temperature dependence: The complete length of the pendulum was protected from temperature changes by a grid made of steel and brass rods with varying thermal expansion rates.
With the help of his grasshopper escapement, John Harrison had made his grandfather clocks work smoothly. Lubrication-free hardwood gears prevented deviations brought on by resinous oil. The decrease of prior errors to less than a tenth was verified by measuring star passes. Then, in 1728, he presented his concept, and in 1735, he created his first model, he planned to create similarly precise clocks for ships. He utilized a bimetallic ship to account for temperature changes.
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If the temperature of a fixed amount of an ideal gas is increased, it NECESSARILY follows that a. the volume of the gas will increase. b. the pressure of the gas will increase. c. its entropy decreases. d. the speed of the gas molecules will increase. e. All of these statements are correct.
The correct statements is (e) all of the above statements.
What is ideal gas?A theoretical gas called an ideal gas is one that has plenty of point particles flying around arbitrarily and without being affected by other particles.
The ideal gas notion is advantageous because it complies with the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis.
According to the Ideal Gas Law, the product of the pressure, volume, and temperature of an ideal gas is constant ( PV = nRT) when the number of moles, n, is held constant.
This means that if the temperature of a fixed amount of an ideal gas is increased, the volume and the pressure of the gas will also increase, and the speed of the gas molecules will increase. However, the entropy will increase, not decrease.
So, the correct answer is a. the volume of the gas will increase. b. the pressure of the gas will increase. d. the speed of the gas molecules will increase.
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A driver, traveling at 22. 0 m/s, slows down her car and stops. What work is done by the friction force against the wheels if the mass of the car is 1500 kg?.
If the car weighs 1500 kg, effective work done through friction factor against the wheels is -3.6 10⁵J.
What does friction signify scientifically?Friction is a force that exists between area of contact that have been rolling or attempted to slide into one another. As an illustration, friction makes it difficult to push a book over the floor. Friction always moves an object in the opposite direction to the way it is moving.
What causes friction in a surface?Academics are unsure about what causes friction, despite the fact that it is thought to be produced by the interaction of minute bumps on objects as they rub against one another. The bumps of each material bend and press against one another.
v² = u² +2as
u= 22m/s
a =10m/s²
v = 0
0= 22² +2×10×s
s = - 484/20
s = - 24.2m
Work done = force × distance
Force = mass × acceleration
Work done = 1500×10× -24.2
= -3.6×10⁵J
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What is the value of ∆ U for isothermal process?
When dT=0 for an isothermal process, dU=0 follows.
[tex]\triangle \ U = C_vdt[/tex]
The system's temperature is maintained using an isothermal thermodynamic process. Thermal equilibrium is maintained because heat is moved into or out of the system so slowly.
The system's temperature, or T=0, is maintained constant through an isothermal process, a type of thermodynamic operation. The temperature remains constant the entire time. Any system with a constant temperature exhibits the isothermal process.
Because the internal energy of an ideal gas includes molecule kinetic energy, which also depends on temperature, internal energy is a function of temperature.
hence we can say that
an isothermal process, dT=0, then ΔU=0.
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A GUT (grand unified theory) refers to theories that
A) unify the strong force and the electromagnetic and weak forces.
B) unify gravity and the strong and weak forces.
C) unify all four forces.
D) unify gravity and the electromagnetic and weak forces.
E) unify the electromagnetic and weak forces.
"A GUT (grand unified theory) refers to theories that unify the strong force and the electromagnetic and weak forces."
Fundamental forces include electromagnetic force, gravitational force, weak force, and the strong force.
A Grand Unified Theory (GUT) is a particle physics model in which the electromagnetic, weak, and strong forces—the three gauge interactions of the Standard Model—merge into a single force at high energies.
Fundamentally, gravity is to be added to Grand Unified Theories as a part of a consistent geometric structure. All forces and matter are characterised in this unified field theory, also known as the E8 theory, as the twisting of a single geometric object.
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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?
(1 point)
Mechanical energy in the water is transferred to turbines that spin a generator, which changes the mechanical energy into electricity.
Chemical energy in the water becomes thermal energy as it moves through turbines, which change thermal energy into electricity.
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.
Kinetic energy in the water becomes potential energy as the water moves through turbines, where kinetic energy becomes
mechanical energy that spins a generator.
The city gets power when 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. Option C
What is the conversion of energy?We know that energy can neither be created nor destroyed but we can be able to convert the energy from one form to another. This is also called the law of thermodynamics. This is the law that lies at the basics of the all the energy transformations that we have.
In this case, we are told that a city gets its electricity from a dam, where water is stored in a reservoir. This means that there ahs to be some energy conversions that would have to go on so that the city would get power and these must involve the water.
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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 finished this assignment.
Consider the following statement.double alpha[10][5];The number of components of alpha is ____. (Points : 4) 15 50 100 150
Answer:
According to C++ syntax, It's 50
Which statement is true about our universe?
Answer:not
Explanation:
Apply the steps of the Scientific Method to explain how you will reduce waste.
a) Use Bullet Points of the Scientific Method and Explain your Steps
By avoiding single-use products and using reusable products, the waste problem can easily manageable.
What are the Scientific Method to reduce waste?Different strategies used by USC researchers to lessen waste include:
Improve the effectiveness of solar energy storage.Look for chances to "upcycle" and use plastic in unusual ways.the "hydrogen motorway" with fuelMake plastics processing safer to get rid of harmful byproducts.Limit the use of plastics.Use reusable shopping bags for more than just groceries.Learn ore about Scientific Method here:
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Find the electric potential difference across lamp 1 if the source has an electric potential difference of 10.9 V, and the electric potential difference across lamp 2 is 4.8 V and lamp 3 is 4.8 V
Answer:
1.5v
Explanation:
To find the electric potential difference across lamp 1, you will need to know the resistances of the lamps and the current flowing through the circuit. The electric potential difference across each lamp is equal to the current flowing through the lamp multiplied by the resistance of the lamp.
You can use Ohm's law to calculate the current flowing through the circuit. Ohm's law states that the current flowing through a conductor is equal to the electric potential difference across the conductor divided by the resistance of the conductor.
Once you have calculated the current, you can use the electric potential difference equation (voltage = current * resistance) to find the electric potential difference across each lamp.
Alternatively, you can use Kirchhoff's voltage law to solve for the electric potential difference across each lamp. Kirchhoff's voltage law states that the sum of the electric potential differences across all of the elements in a circuit is equal to the electric potential difference of the source. So, if the electric potential difference across lamps 2 and 3 is 4.8 V each, and the electric potential difference of the source is 10.9 V, then the electric potential difference across lamp 1 must be 1.5 V.
a 1.0 kg chunk of putty moving at 1.0 m/s collides and sticks to a 5.0 kg bowling ball that is initially at rest. What is the magnitude of the momentum of the ball and putty after the collision
The magnitude of the momentum after the collision between the ball and the putty is 0.167 m/s
Following the two balls collided, our task is to determine the velocities of the first and second balls after the impact. In order to complete this, we can apply the law of the conservation of momentum, which states that the total momentum before the collision must be equal to the momentum after the contact. In this case, we are given that:
Mass of the first ball (m1) = 1 kg
Mass of the second ball (m2) = 5 kg
Initial velocity of the first ball (v1) = 1 m/s
Initial velocity of the second ball (v2) = 0 m/s
To calculate the final magnitude of momentum, we can use this following formula:
m1 v1 + m2 v2 = (m1 + m2) v
1 kg x 1 m/s + 5 kg x 0 m/s = (1 kg + 5 kg) v
v = 0.167 m/s
Thus, the final magnitude of the momentum would be 0.167 m/s
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If earth's orbit around the sun were to double in size, the new "year" would be
a) less than 2
b) 2
c) more than 2 current earth years
There would be a new "year" that would last longer than two years on Earth.
If the mass of the Sun quadrupled, what would happen to Earth's orbit?The Earth's orbit would transform to an ellipse if the sun's mass doubled without pushing or pulling on the planet; this would bring the Earth out to its present radius but would spend most of its time closer to the sun.
What would occur if the Earth orbited the Sun at a faster rate?The earth would move out into a far bigger orbit and it would take much longer to complete a round around the sun if the speed at which it moves in orbit were two times as fast as it is now (about 67,000 mph vs. real). Due to this.
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a car travelling with a speed of 20m/s approach a traffic light when he was 55m from the stop light the light turned red, he immediately applied a break causing an uniform acceleration of 4m/s what the time taken to stop the car
Answer:
5 seconds.
Explanation:
v = u + at
0 = 20 - 4t
t = 5
A 1.0m×1.0m×1.0m cube of nitrogen gas is at 20∘C and 1.0 atm. Estimate the number of molecules in the cube with a speed between 700 m/s and 1000 m/s.
The number of molecules in the cube is 2.69 x [tex]10^{25}[/tex] molecules. Estimating the number of molecules in the cube with a speed between 700 m/s and 1000 m/s requires Maxwell-Boltzmann distribution also the cube is not a thermally isolated system, so the real temperature and pressure may be different from the initial conditions given.
To estimate the number of nitrogen molecules in the cube with a speed between 700 m/s and 1000 m/s, we can use the kinetic theory of gases. The kinetic theory of gases states that the total kinetic energy of a gas is proportional to the temperature, and the number of gas molecules is proportional to the pressure and the volume.
Given that the cube of nitrogen gas is at 20°C, and 1.0 atm, we can use the ideal gas law PV = nRT to estimate the number of molecules in the cube.
We know that P = 1.0 atm, V = 1.0 m³, R = 8.314 J/(mol·K), and T = 293.15 K.
n = (PV)/(RT)
n = (1.0 x [tex]10^5[/tex] Pa 1.0 m³) / (8.314 J/(mol·K) * 293.15 K)
n = 2.69 x [tex]10^{25}[/tex] molecules
Now to find the number of molecules with a speed between 700 m/s and 1000 m/s we can use the Maxwell-Boltzmann distribution. This distribution tells us that the probability of a molecule having a certain speed is given by a specific function. The integral of this function between 700 m/s and 1000 m/s will give us the fraction of molecules that have a speed in that range.
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If your truck has a properly functioning dual air brake system and minimum size air tanks the air pressure should build up from 85 to 100 psi within how many seconds
In dual air systems, the pressure should increase from 85 to 100 psi within 45 seconds of the engine reaching working rpms. (If the vehicle has air tanks that are greater than the required size.
What is a brake system?Through friction, the braking system transforms the kinetic energy in your moving vehicle into heat energy. Your more than four thousand pound metal machine is stopped and slowed down using that energy. The idea is the same, but the equipment is a little more complicated.
What happens if the brakes don't work?The car may veer to one side if the braking system isn't working properly. Accidents resulting from this circumstance may range in severity from minor collisions to catastrophic ones. If there has been a brake fluid leak, if the brakes need to be changed, or if the stopper has locked, you could also sense tugging.
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unsorted debris from ice sheets, after deposition, is known as ________.
"Unsorted debris from ice sheets, after deposition, is known as glacial till."
Sediments of all sizes, including boulder-sized chunks and microscopic particles smaller than a sand grain, are mixed together in glacial till. Glacial flour is that smallest size of sediment (much smaller than sand) and is responsible for the milky, coloured water in the rivers, streams, and lakes that are fed by glaciers.
Till is unorganised, undisturbed drift that is typically over-consolidated and is dumped straight by and beneath a glacier without being further processed by glacial water. It is made up of a heterogeneous collection of boulders that range greatly in size and shape, as well as clay, sand, and gravel.
Till, which is rock material carried by a glacier and dumped from the ice or from rushing water issuing from the ice, is a type of glacial drift. It differs from other types of drift in that glaciers directly deposit it without the assistance of meltwater.
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A hollow copper tube carries a current along its length. Why is B = 0 inside the tube? Is B nonzero outside of the tube?
It is equal to zero because there is no current inside, so the magnetic field will be zero. Yes, it is nonzero if it is outside the tube.
Based on the picture attached, we can apply Ampere's law to the circular path which labeled 1 in the picture. It is because the current has a cylindrical symmetry about its central axis, so the line integral decreases to the magnitude of the magnetic field times the circumference of the path, but it is equal to zero because there is no current inside this path; consequently, the magnetic field inside the tube have to be zero. On the other side, the current through path 2 is the current carried by the conductor, so then the line integral is not equal to zero, thus the magnetic field outside the tube is non zero.
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