When viewed above the North Pole, the Earth rotates counterclockwise, from west to east. This is also called a prograde rotation.
When viewed from above Earth's North Pole Which way does Earth orbit the sun?The Earth rotates around the Sun-also counterclockwise viewed from above the North Pole, clockwise observe from the South Pole-to give us our years. The plane of the Earth's orbit is called the sphere where aureole happens. Because of this direction of rotation, we see the sun rising every day in the east and position in the west.
As we viewed above the earth revolves empty around the sun each year when viewed from above the north pole. We know that the Earth is viewed once in twenty-four hours.
So we can conclude that Earth when seen from the top of the north pole, will be seen revolve in anti-clockwise.
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Two people stand in place and pull on a rope in opposite directions. Which of the following correctly describes the movement of a flag tied in the middle of the rope
The rope's center flag remains stationary. Because the force being provided by your team to pull the flag is equal to the force being exerted by the opposing team but in the opposite direction, the flag does not move. The forces are acting in opposing ways.
It balances the forces acting on the rope. The flag in the middle of the rope won't move when the forces are balanced. One team must exert more force than the other in order to win the game.
Two forces are said to be balanced when their strengths are equal but their directions of action are opposing. Once more, tug-of-war is a prime illustration. The forces are balanced if the pullers are exerting equal force but going in the opposite direction on either side of the rope. There is hence no motion.
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On a frozen pond, a 10 kg sled is given a kick that imparts to it an initial speed of 7.4 m/s. The coefficient of kinetic friction between sled and ice is 0.13. Find the distance the sled moves before coming to rest. The acceleration of gravity is 9.8 m/s2 . Answer in units of m.
The sled travels 21.5 meters before coming to a stop.
What is coefficient of kinetic friction?The coefficient of friction measures the amount of friction between two surfaces. Calculating the resistance to motion at the interface of two surfaces of similar or different materials is what a coefficient of friction is. COF (coefficient of friction) is a dimensionless quantity defined as the ratio of friction force to normal force (Eqn (2.1)). Lubricous materials have a coefficient of friction (COF) less than 0.1.
Here,
coefficient of kinetic friction=0.13
u=7.4 m/s
g=9.8 m/s²
a=coefficient of kinetic friction*g
=0.13*9.8
a=-1.274 m/s²
v=0
v²=u²+2as
0=7.4²-2*1.274*s
0=54.76-2.548s
s=54.76/2.548
s=21.5 m
The distance the sled moves before coming to rest is 21.5 m.
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An engine absorbs 2310 J as heat from a hot reservoir and gives off 830 J as heat to a cold reservoir during each cycle. What is the efficiency of the engine
The efficiency of the heat engine giving heat from a hot reservoir to a cold reservoir is calculated to be 64%.
Given that,
Heat energy absorbed Q₁ = 2310 J
Heat energy released Q₂ = 830 J
The efficiency of the heat engine is given by the formula and putting the values in it we have,
η = [1 - (Q₂/Q₁)] × 100
where, η is efficiency
⇒ [1 - (830/2310)] × 100 = 0.64 × 100 = 64%
Thus, the efficiency of the heat engine giving heat from a hot reservoir to a cold reservoir is calculated to be 64%.
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Combine newton's 2nd law and hooke's law for a spring to find the acceleration of the block a(t) as a function of time. Express your answer in terms of k , m , and the coordinate of the block x(t).
The combined formula of Newton's second law and Hook's law to find the acceleration of a block as function of time is a(t) = [k. t (v0 + vf)]/2m.
What is the Newton's second law of motion?According to Newton's second law of motion, force applied to any object is directly proportional to the product of mass and acceleration.
F = ma
As we know that the Hook's law is given as;
F = kx
Combining two equations together; we get
ma = kx
So, a = kx/m
x is the extension of the spring
So, x = (v0 + vf)*t/2
a = kx/m= {k* (v0 + vf)*t/2}/m
So, a = [k. t (v0 + vf)]/2m
Thus, combined formula of Newton's second law and Hook's law to determine the acceleration of a block as function of time is a(t) = [k. t (v0 + vf)]/2m.
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NEED DONE TNIGHTTTT PLEASEEE
The acceleration due to gravity experienced by the cosmonauts is 8.8 m/s².
What is the acceleration due to gravity experienced by the cosmonauts?The magnitude of Earth's gravitational field and the acceleration due to gravity experienced by the cosmonauts is calculated as follows;
E = Gm / r²
g = Gm / r²
where;
G is universal gravitation constantm is the mass of Jupiterr is the radius of Jupiter from the spacecraftE is the Earth's gravitational field g is acceleration due to gravityThe acceleration due to gravity experienced by the cosmonauts is calculated as
g = ( 6.67 x 10⁻¹¹ x 5.97 x 10²⁴ ) / ( 3.59 x 10⁵ + 6.37 x 10⁶ )²
g = 8.79 m/s²
g ≈ 8.8 m/s²
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Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?a caliper and a flaska stopwatch and a beakera balance and a beakera meter stick and a temperature probe.
Pair of lab instruments would a student use to measure the density of seawater the a balance and a graduated cylinder.
The volume of the seawater is calculated by a graduated cylinder and the mass is obtained by a balance we can find the density of the sea water.For samples containing solids pouring liquid into the graduated cylinder must be done quickly to avoid loss of solids.
Used when specified by the method, Used for sample volumes and chemical additions, where: Measured volume is greater than 25 mL, and Accuracy within 0.5% is acceptable. If the sample contains large amounts of solids, care must be taken to ensure the contents of the graduated cylinder is mixed during adjustments.
Graduated cylinder should, Have sufficient capacity, Be as close to the desired volume as feasible, Have graduations that allow measurement to the desired volume.
The given question is incomplete, the complete question is
Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?
1. a caliper and
2. a flask
3. a stopwatch and a beaker
4. a balance and a graduated cylinder
5. a meter stick and a temperature probe
Hence, the correct option is 4.
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A student would use a balance and a graduated cylinder as a pair of lab tools to calculate the density of seawater.
We can determine the density of the sea water by using a graduated cylinder to calculate the volume and a balance to get the mass.
Pouring liquid into the graduated cylinder for samples that include solids must be done rapidly to prevent solids loss.
when the method so specifies, Used when the measured volume is higher than 25 mL and an accuracy of 0.5% is acceptable for chemical additions and sample quantities. Care must be taken to ensure that the contents of the graduated cylinder are mixed during adjustments if the sample contains significant amounts of solids.
Graduated cylinders have enough capacity, be as near as you can to the specified volume, have graduations that make it possible to measure the desired volume.
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What did you include in your response? Check all that apply. Water molecules are made of two different kinds of atoms. All water molecules have twice as many hydrogen atoms as oxygen atoms. All water molecules have one oxygen atom for every two hydrogen atoms.
Water molecules are made of two different kinds of atoms.
All water molecules have twice as many hydrogen atoms as oxygen atoms.
All water molecules have one oxygen atom for every two hydrogen atoms.
What is the importance of water?Water to replenish the lost liquid from sweat. You also need enough water in your system in order to have healthy stool and avoid the problem of constipation. Our kidneys are important for filtering out waste material through the help of urination. Adequate water intake helps our kidneys to work more efficiently and helps to prevent the problem of kidney stones.
Water is so important because sixty percent of our body weight is comprise of water. Our bodies use water in all the cells, organs, and tissues, to help regulate body temperature and maintain other bodily functions. Water helps improve the circulation of oxygen throughout the body. It also plays a crucial role in the digestion of food. Water is a very important component of saliva, which helps break down food. The excretion of waste in the human body requires water.
So we can conclude that all the options are correct.
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A cylinder with cross-section area A floats with its long axis vertical in a liquid of density p. Part A Pressing down on the cylinder pushes it deeper into the liquid. Find an expression for the force needed to push the cylinder distance z deeper into the liquid and hold it there. Express your answer in terms of the variables P, A, and c. F = pAcg Submit Previous Answers ✓ Correct Part B A 5.0-cm-diameter cylinder floats in water. How much work must be done to push the cylinder 17 cm deeper into the water?
PART A:
The buoyant force is given by F = pAcg, where p is the density of the liquid, A is the cross-sectional area of the cylinder, and g is the acceleration due to gravity.
PART B:
Multiplying the force by the distance the cylinder is pushed, 17 cm, we get the work done to be W = (39.4 N)(0.17 m) = 6.74 J. So, the work done to push the cylinder 17 cm deeper into the water is 6.74 J.
THE CYLINDER EXPRESSIONPart A:
The force needed to push the cylinder distance z deeper into the liquid and hold it there is given by the buoyant force acting on the cylinder, which is equal to the weight of the fluid that the cylinder displaces. This buoyant force is given by F = pAcg, where p is the density of the liquid, A is the cross-sectional area of the cylinder, and g is the acceleration due to gravity.
Part B:
To find the amount of work done to push the cylinder 17 cm deeper into the water, we need to find the force required to do so and multiply it by the distance over which the force is applied. Using the formula from Part A, the force required is F = pAcg = (1000 kg/m³)(pi(0.05 m)²)(9.8 m/s²) = 39.4 N. Multiplying this force by the distance the cylinder is pushed, 17 cm, we get the work done to be W = (39.4 N)(0.17 m) = 6.74 J. So, the work done to push the cylinder 17 cm deeper into the water is 6.74 J.
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Two-year-old Dirk's sentences—"Dad come," "Mom laugh," and "Truck gone"—are examples of
A) babbling.
B) receptive language.
C) telegraphic speech.
D) universal grammar.
Babbling, is Two-year-old Dirk's sentences—"Dad come," "Mom laugh," and "Truck gone"—are examples.
What is a sentence ?A sentence is a group of words that contains at least one subject and one predicate and makes complete sense. Note: a sentence starts with a capital letter and ends with a full stop. Example: A good businessman maintains good relations with his customer.
What is full sentence?A complete sentence has to have a subject and a verb, and the verb has to be a "finite": A sentence with its main verb in an '-ing' form will not be a complete sentence. *Marge swimming. A sentence with its main verb in an infinitive form ("to" + verb) will not be a complete sentence. *Homer to swim.
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During a game of handball, you strike the ball with a mass of. 06 kg, and it accelerates to the left at a rate of 13. 7 m/s2. What force did your hand exert on the ball?.
The force exerted by the hand on the ball has a mass of 0.06 kg is 0.822 N
The mass of the ball = 0.06 kg
The acceleration of the ball = 13.7 m/s²
In physics, force is defined as:
Pushing or pulling an object with mass changes its velocity. A force is an external factor that can alter the body's state of rest or motion. It has size and direction.
The force exerted on the ball can be found using the formula,
F = ma
where F is the force
m is the mass
a is the acceleration
Let us substitute the known values in the above equation, we get
F = 0.06 x 13.7
= 0.822 N
Therefore, the force exerted on the ball is 0.822 N
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Which of the following is true about Russia's natural resources?
A: The forested regions of Siberia are the largest in the world.
B: Its resources are easy to extract.
C: The nation doesn't have large reserves of coal or natural gas.
D: Russia is among the world's bottom producers of nickel and aluminum.
Answer:
A: The forested regions of Siberia are the largest in the world.
Explanation:
The energy flow to the earth from sunlight is about 1.4kW/m^2
(a) Find the maximum values of the electric and magnetic fields for a sinusoidal wave of this intensity.
(b) The distance from the earth to the sun is about
1.5×10^11 m. Find the total power radiated by the sun
The maximum values of the electric and magnetic fields for a sinusoidal wave of this intensity E_max ≈ 1026 V/m.
Ours is given;I = 1.4kW/m2 = 1400 W/m2 is the intensity.
The following is the formula for the maximum value of the electric field in respect to intensity:
E max = (I/2(o•c))
Where;
Electric constant _o is equal to 8.85 10(-12) C2/N.m2.
c is the speed of light, which is 3 10(8) m/s.
Thus;
E max = √(2 × 1400)/(8.85 × 10^(-12) × 3 × 10^(8)))
E max 1026 mV
The maximal magnetic field formula is;
E max/c = B max
B max = 1026/(3 × 10^(8))
B max = 3.46 × 10^(-6) (-6) T
The equation for total power is;
P = IA
Where;
A = area = 4 r2.
Ours is given;
Radius: 1.5 10(11) meters
A = 4π × (1.5 × 10^(11))
² = 2.82 × 10^(23) m²
P = 1400 × 2.82 × 10^(23)
P = 3.95 × 10^(26) W
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1. In a parallel circuit a component has a potential
difference across it of 9V.
a) What would be the voltage through
the other components in the circuit?
Answer: 9 volts
Explanation:
One rule of Parallel circuits: All components share the same voltage
Measure the initial force (in Newton) needed to get the brick going, as well as the force needed to keep it going smoothly once it started moving.
The brick has a string tied around it. Which is used to love the brick.
The weight of the brick and the amount of friction it experiences with the surface it is resting on will determine the initial force required to start the brick moving. The initial force required to move a brick would be 32 N if the brick were built of concrete, weighed 8 kg, and had a 0.4 coefficient of friction with the surface.
What exactly is a force?Any physical action that can modify the velocity, direction, shape, or energy of an item is referred to as having force. It is a fundamental idea in physics, and examples of it in more complicated phenomena as well as in real-world situations can be found.
The force of gravity, which holds us on the ground, and the force used when pushing or dragging an object are two examples of common forces. The interactions between atoms and particles and their effects on the behavior of larger objects are explained by more complicated forces, such as the force of magnetism. In the end, all forces arise from interactions between particles, and the study of these forces' behavior falls under the purview of physics.
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A car starts rolling down a 1-in-4 hill (1-in-4 means that for each 4m traveled along the road, the elevation change is 1m) How fast is it going when it reaches the bottom after traveling 55m?
(a) ignore friction.
(b) Assume an effective coefficient of friction equal to 0.10
The velocity of the car when it reaches the bottom after traveling 55m is equal to 16 m/s.
What is the equation of motion?Equations of motion are used to explain the concept of motion such as the time, position, velocity, and acceleration at several times. The equations of motion give the expression between velocity, time, displacement, and acceleration.
Given, an effective coefficient of friction = 0.10
The distance traveled by car, S = 55 m
sinθ = 1/4
θ = 14.47°
mgsinθ - μ mg cos θ = ma
9.8 (sin 14.47) - 0.10 cos 14.47 = a
a = 2.448 - 0.968
a = 2.35 m/s²
We can determine the final velocity of the car from the third equation of motion:
v² - u² = 2aS
(v)² - 0² = 2 × 2.35 × 55
v = 16 m/s
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Did Darwin use a chronometer?
No, Charles Darwin did not use a chronometer. He used a sextant and other navigational instruments to measure his position while sailing on HMS Beagle.
Navigational Instruments Used by Charles Darwin on HMS BeagleCharles Darwin was a scientist and naturalist who made significant contributions to our understanding of evolution and the natural world. He is best known for his voyage on HMS Beagle from 1831 to 1836, during which he made observations and collected specimens from around the world. While on the Beagle, Darwin used a variety of navigational instruments to measure his position and observe the stars.
The most important tool that Darwin used was a sextant. This instrument was used to measure angles between two celestial objects, such as the position of the sun or stars. Using this data, navigators could calculate their position on Earth. Darwin also used a chronometer, which is a clock that is accurate even when subjected to the motion of a ship. This allowed him to maintain accurate time and calculate longitude.
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A student slides her 80.0-kg desk across the level floor of her dormitory room a distance 2.00 m at constant speed. If the coefficient of kinetic friction between the desk and the floor is 0.400, how much work did she do?
Answer:
628 J
Explanation:
Force of friction x distance = work
force of friction = normal force * coeff
= ( 80 kg * 9.81 m/s^2) * .4 = 313.92 N
3139.2N * 2 m = 627.84 J = ~ 628 J
A 150-kg object takes 1.5 minutes to travel a 2,500-meter straight path. it begins the trip traveling 120 meters per second and decelerates to a velocity of 20 meters per second. what was its acceleration? responses −1.11 m/s2 negative 1.11 meters per second squared, −0.3 m/s2 negative 0.3 meters per second squared, 1.11 m/s2 plus 1.11 meters per second squared, 80 m/s2
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
A 8.3 cm diameter loop of wire is initially oriented perpendicular to a 1.5 T magnetic field. It is rotated so that its plane is parallel to the field direction in 0.26 s. What is the average induced emf in the loop
A wire loop with an initial 8.3 cm diameter is pointed directly at such a 1.5 T magnetic field. The loop's average induced emf is o.29 v.
How does EMF work?electromagnetic radiation-induced electric and magnetic forces. Researchers are examining whether the electromagnetic fields (EMFs) produced by electrical equipment, wireless and cellular cellphones, and power lines can result in cancer or other negative health effects. likewise known as electromagnetic field.
Do people possess EMF?Non-ionizing EMFs can come from both natural and man-made sources. One examples of a naturally present EMF is the global magnetic field, which makes the compass needle point north. That both ELF and RF categories of the non-ionizing portion of the spectrum apply to human-made EMFs.
∈εc = - (ΔΦ-θ)/Δt
= - (ABΔcosθ)/Δt
= - (π(0.110 m)² 1.5 T(cos90^∘-cos0^∘)/(0.20 s)
= - (π(0.110 m)² 1.5 T(0-1) /(0.20s)
avg. emf = 0.29 V
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A jogger runs on a path at a speed of 0.075 miles per minute. a second jogger starts 5 minutes later from the same spot, but runs at a rate of 0.1 miles per minute. create a pair of parametric equations to represent the paths of the joggers. how far down the path from the starting point does the second runner overtake the first runner? a. 0.2 miles b. 0.5 miles c. 1.5 miles d. 2.9 miles
In Fig. 5-64, a force F of magnitude 12 N is applied to a FedEx box of mass m_2 = 1.0 kg. The force is directed up a plane tilted by theta = 37degree. The box is connected by a cord to a UPS box of mass m_1 = 3.0 kg on the floor, The floor, plane, and pulley are frictionless, and the masses of the pulley and cord are negligible. What is the tension in the cord?
The forces acting on m 2 are F acting uphill, T acting downward, and m 2 gsin acting downhill, where o=37 o. The rightward-pointing tension is the sole horizontal force acting on m 1. The result of the tension is 4.6 n.
How do tension forces work?In physics, a tension force is a force created when a rope, string, or cable is stretched as a result of an external force. Along the length of the rope or cable, tension is exerted in the opposite direction as the force acting on it. Stress, tensity, and tautness are other terms that may be used to describe tension.
Describe tension force with an example.Compression force's opposite is tension. Every object in the scene that is in contact with another one produces a force.
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If A and B are nonzero vectors for which A·B = 0, it must follow that A) A×B = 0. B) A is parallel to B . C) |A ×B | = AB. D) | A× B| = 1.
In the past, the Moon was closer to Earth, and the differences in the heights of the ocean at high and low tides were:
Answer:
"Greater"
If the moon is on the same side of the earth as the sun then one would expect a high tide (greater attraction of the water on the earth)
Likewise, if the moon and sun were on opposite sides of the earth, then one would expect the tide formed to be smaller.
HELP!!!!
My science teacher is no help
A basketball player is dribbling a basketball at a speed of 10 mph. The basketball has a mass of 0.625 kg and a radius of 0.11 m. Calculate the angular momentum of the basketball.
In order to calculate the angular momentum of the basketball, we need to know the rotational speed of the ball. Since the ball is dribbled at a speed of 10 mph, we can assume that its rotational speed is much smaller than this. Let's assume that the rotational speed of the ball is r revolutions per minute (rpm).
The angular momentum of the ball is then given by the following formula:
L = I * w
Where I is the moment of inertia of the ball and w is its angular velocity.
The moment of inertia of a sphere is given by the following formula:
I = (2/5) * m * r^2
Where m is the mass of the ball and r is its radius.
Substituting these values into the formula for angular momentum, we get:
L = (2/5) * 0.625 kg * (0.11 m)^2 * r rpm
Solving for r, we get:
r = (5/2) * L / (0.625 kg * (0.11 m)^2)
Therefore, the angular momentum of the basketball is directly proportional to its rotational speed. If we want to increase the angular momentum of the ball, we would need to increase its rotational speed.
a book weighs 6 n. when held at rest above your head the net force on the book is
Answer:
6x9.8=58.8N
explanation:
F=MA
The amplitude of a linearly damped harmonic oscillator decreases from 60. 0 cm to 40. 0 cm in 10. 0 s. What will be the amplitude of the harmonic oscillator after another 10. 0 s passes?.
The amplitude of the harmonic oscillator after 20s is calculated to be 32 cm.
What is amplitude?Amplitude is defined as the the maximum displacement from equilibrium. Amplitude of a wave is taken as the distance from the center line to the top of a crest or to the bottom of a trough .
Given, At = 40 cm at 10 s
Given, Ao = 60 cm and time, t = 10
Formula for amplitude is :
At = Ao (e^t/τ)
40 = 60 e^10/τ
ln 2/3 = 10/τ
τ = 24.66
A20 s = 60 e ^(2-/24.66)
A20 s = 32 cm
The amplitude of the harmonic oscillator after 20 s is 32 cm.
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What does chronometer movement mean?
Chronometer movement is a term used to describe a type of watch movement that has been tested and certified to meet high accuracy standards. Chronometer movements are known for their precision and reliability, and are commonly found in high-end watches.
The Benefits of a Chronometer Movement: Why Accuracy Matters in a High-Quality WatchWhen it comes to choosing a watch, one of the most important features to consider is the movement, or type of mechanism that powers the watch. Specifically, a chronometer movement is one of the highest quality movements available, and it can make a huge difference in the accuracy and reliability of a watch. In this essay, we will discuss the benefits of a chronometer movement, and explain why having an accurate watch is so important.
One of the major benefits of a chronometer movement is its accuracy. Chronometer movements are tested and certified by the Official Swiss Chronometer Testing Institute (COSC) to meet extremely high accuracy standards. This means that watches with a chronometer movement can keep time with an accuracy of up to -4/+6 seconds per day, which is far more accurate than most standard movements. This accuracy ensures that the watch will keep time accurately, even when subjected to external factors such as temperature and pressure.
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Fill in the blank
Waves can be classified by how the particles in the disturbance ______________.
what is the magnitude of the force f⃗ on the -10 nc charge in (figure 1)? suppose that a = 2.4 cm.
The force is -7.81105 N in magnitude. The object is propelled by external forces. The object's overall motion is unaffected by an internal force.
In science, what exactly is a force?
The term "force" has a clear definition in science. It is perfectly acceptable to refer to a force at this level as a push or a pull. An object does not "have in it" or "contain" a force. One object is subject to a force from another.
What is an illustration of force?
A force is a push that has the power to accelerate something. This can literally mean pushing something to move it around the room, like a big piece of furniture.
F = Kq1q2/r^2
q1 and q2 = charges
K = electric constant
r = distance of separation
F = force
Then we have;
F = 9 * 10^9 * 5 * 10^-9 * (-10 * 10^-10)/(0.018)^2
F = -4.5 * 10^-8/3.24 * 10^-4
F = -7.81×10⁻⁵ N
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Which of the following is not a unit of pressure?
O atmosphere
O psi
O N/m2
O mm of mercury
O pascal
O none of the above
The pressure unit is not the Newton. It is a measure of force. Newton is the right answer, thus.
What are the 4 pressure units?Other pressure measurements include pounds per square inch, bar, centimetres of water, millimetres of mercury, inches of mercury (used to measure blood pressure), torr, MSW, and FSW. Atmospheric pressure is measured in atm.
What are the 5 pressure units?Bar, atm, Pascal, kilo Pascal, and torr are the five different pressure units. The perpendicular force applied in a given region is what is referred to as pressure.
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