The electron drift speed in a copper wire with a cross-sectional area of 7.4x10⁻⁷ m² carrying a current of 1 A is approximately 10⁻⁴ m/s.(D)
1. Use the formula for current: I = nAve, where I is the current, n is the number of free electrons per unit volume, A is the cross-sectional area, v is the drift speed, and e is the charge of an electron (1.6x10⁻¹⁹ C).
2. Substitute the given values: 1 A = (8.4x10²⁸ electrons/m³)(7.4x10⁻⁷ m²)(v)(1.6x10⁻¹⁹ C).
3. Solve for v: v = 1 A / [(8.4x10²⁸ electrons/m³)(7.4x10⁻⁷ m²)(1.6x10⁻¹⁹ C)] ≈ 10⁻⁴ m/s.(D)
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What is the formula for calculating magnitude?
The formula for calculating magnitude is |v| =√(x2 + y2)
A vector formula's magnitude can be used to condense the numerical value of a particular vector. A vector has a magnitude and a direction. This magnitude of a vector formula provides a summary of the individual vector measurements along the x, y, and z axes. The symbol for it is |v|.
|v| =(x2 + y2) is the formula to calculate the magnitude of a vector (in two dimensions) v = (x, y). The Pythagorean theorem serves as the basis for this formula.
|V| = (x2 + y2 + z2) is the formula to calculate the magnitude of a vector (in three-dimensional space) V = (x, y, z).
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If it takes 1998 to heat 150g of a substance from 25^oC to 55^oc what is the specific heat of substance
The specific heat capacity of the substance is 444 J/kg.°C.
What is specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C).
To calculate the specific heat capacity of the substance, we use the formula below
Formula:
c = q/mΔt...................... Equation 1Where:
c = Specific heat capacity q = Amount of heatm = MassΔt = Change in temperatureFrom the question,
Given:
q = 1998 Jm = 150 g = 0.15 kgΔt = 55-25 = 30°CSubstitute these values into equation 1
c = 1998/(0.15×30)c = 1998/4.5c = 444 J/kg.°CHence, the specific heat capacity is 444 J/kg.°C.
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The wind on which planet can blow up to 1,500 miles per hour?
The wind on Jupiter planet can blow up to 1,500 miles per hour.
What is planet?A planet is a large celestial body that orbits a star, usually a sun, and has its own gravity. Planets are classified by size, composition, and distance from the star. They are made up of rock, metal, or gas and can contain an atmosphere. Planets can have satellites, or moons, which orbit them. They can also have asteroids, comets, and other objects around them. Some planets have rings, like Saturn, and some have many moons, like Jupiter. Planets are fascinating to study and explore.
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This is a photo of the constellation Orion. Orion can be seen from most places in the world at some point during the year. Orion is not seen from the same place all year long because
Orion can be seen from most places in the world at some point during the year but is not seen from the same place all year long because the earth orbits the sun which result in changes in the night view.
What is Orion?This is referred to as a prominent constellation located on the celestial equator and visible throughout the world ans it is the most conspicuous in the night sky.
This is therefore the reason why it can be seen from most places in the world at some point during the year. During some periods, it is not seen from the same place all year long because the earth orbits the sun which result in changes in the night view and hinders people from seeing it.
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What will be the acceleration, if a vehicle started from rest and its velocity reached 20 m/s after 5 second? Calculate. Ans: 4m/s (2)
Answer: 4m/s2 ✅
Explanation: A vehicle started from rest and its velocity reached 20m/s after 5 seconds. To calculate the acceleration, we can use the formula: acceleration = (change in velocity) / (change in time).
The change in velocity is 20m/s - 0m/s = 20m/s (the final velocity minus the initial velocity)
The change in time is 5 seconds (the time it takes for the velocity to change)
So the acceleration of the vehicle is (20m/s) / (5s) = 4m/s2✅
Answer: The acceleration of the car starting from rest is 4 m/s^2✅
Explanation:
It is an exercise of uniformly varied rectilinear movement.
What will be the acceleration, if a vehicle started from rest and its velocity reached 20 m/s after 5 second?
Data:
a = acceleration = ?
Vo = initial speed = 0
Vf = Final speed = 20 m/s
t = time = 5 s
The formula to calculate the acceleration is a = (Vf - Vo)/t, but it tells us that the car starts from rest, that is, it has no initial velocity, we clear the formula and we are left:
a = Vf/t
a = (20 m/s)/5 s
a = 4 m/s²
The acceleration of the car starting from rest is 4 m/s^2✅.
What are the benefits and drawbacks of using geothermal energy as a source of electricity?
Compared to traditional fuels, this energy source is more environmentally benign. a supply of clean energy.
With continued industry research and development, there will be more geothermal resources that can be used for energy production. a sustainable source of energy since, unlike wind and solar, it is constantly available. No fuel is necessary.
The fact that geothermal energy is location-specific is its biggest drawback. Digging causes the discharge of gases into the atmosphere. Earthquakes may be sparked by geothermal energy. High upfront expenses of $2 to $7 million for a plant with a 1-megawatt capacity make this resource expensive to use. No fuel is necessary.
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5 decades is what fraction of a century?
A motion has been made that the Taylorsville Community Group participate in the communit
"Toys for Tots" fund-raising campaign. You are the chairperson.
What type of motion is this?
The Taylorsville Volunteer Organization participating in the community is the subject of a key motion.
What is motion?The motion of an object is the change in its position over time. It can be measured in speed, velocity, and acceleration. Speed is how fast an object is moving, velocity is speed in a particular direction, and acceleration is the rate of change of velocity. Motion can be linear, circular, or oscillatory. Linear motion is the movement of an object in a straight line, circular motion is the movement of an object in a circle, and oscillatory motion is the movement of an object back and forth. Motion can also be described in terms of forces like gravity, friction, and momentum.
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Mars has two moons, Phobos and Deimos. Based on the image shown,
describe the force vectors representing the gravitational interactions
between Phobos, Deimos, and Mars. Based on the image, choose the
option that correctly identifies the missing terms, in order of their
appearance in the sentences. Mars has
force vectors pointing in
vector on Phobos from the force of gravity of Deimos is
the force vector on Deimos from the force of gravity of Phobos.
gravitational
The magnitude of the force
Answer:
3
Explanation:
seems more reasonable because of the fact that the other moon is on the other gravitational pull because of the outer ring and are the exact opposite sides
Select the correct answer. An object is dropped from a height of 25 meters. At what velocity will it hit the ground
Velocity with which the object hits the ground will be 22.3 m/sec.
Velocity is the rate of change of distance with respect to time.
It has the SI unit as m/sec.Also, the total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.According to the third equation of motion, it relates final velocity with the initial velocity and acceleration
Mathematically, v² = u² + 2as
s = 25 m
a = g = acceleration due to gravity because the object is falling towards the ground = 9.8 m/sec²
u = initial velocity = 0 m/s
v = final velocity = which is to be calculated
v² = u² + 2as
v² = 0 + 2 x 10 x 25
v² = 500
v = [tex]\sqrt{500}\\[/tex]
v = 22.3 m/sec
Velocity of the object will be 22.3 m/sec when it will hit the ground.
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During a heated game of bocce ball, Ursula is attempting to knock the pallino (the small, white target ball) away from where her opponent's balls lie on the ground. She can do this by throwing her ball so that it lands directly on top of the pallino, which is
x=17 m
horizontally downcourt from where she throws. If she releases the ball
y=0.90 m
above the ground at an angle of
θ=23
∘
above the horizontal, then how much time will the ball spend airborne before hitting the pallino? Both balls may be treated as point particles in this problem.
2. Consider a vector 10 units long at an angle of 120 degrees from the positive x axis. Find the x and y components of this vector.
Please help physics brain
x component = 10 Cos 120° = -5
y component = 10 Sin 120° = 5√3
What is a vector component?In vector algebra, vectors are added, subtracted, and multiplied using vector components. On diagrams, vectors are typically indicated by an arrow. The direction and magnitude of the vector are shown by the tip of the arrow and its length, respectively.
The use of vector components enables us to split a single vector quantity into two (or more) simpler scalar quantities. In vector algebra, vectors are added, subtracted, and multiplied using vector components.
Another method for locating vector components is to use the angle measured in the opposite direction from the +x axis. Then, the x-component will always be cosθ and the y-component will always be sinθ. Hence, the x component will be -5, and the y component will be 5√3.
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The change in internal energy of a system is -5.155 kJ. The system absorbs 2500 J of heat.
Which of the following BEST describes the work related to the system?
A The system performs 7.655 kJ of work on the surroundings.
B The system has 7.655 kJ of work done by the surroundings.
C The system has 2.655 kJ of work done by the surroundings.
D The system performs 2.655 kJ of work on the surroundings.
The work done by the system is -2.655KJ. This states that the system performs 2.655KJ of work on the surroundings. Thus, the correct option is D.
What is work done?Work done is defined as the product of force and the distance over which the force is applied on the object. Work is done when a force is applied to an object and the object experiences motion through a distance.
Given that the work is done on the surrounding, i.e., the work is done by the system and the heat is absorbed by the system.
Therefore,
ΔU = -5.155KJ
q = 2500J = 2.5KJ
Now from first law of thermodynamics,
ΔU = q + w
-5.155 = 2.500 + w = -2.655KJ
w = -2.655KJ
Hence the work done is -2.655kJ.
Therefore, the system performs 2.655KJ of work on the surroundings. The correct option is D.
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Explain the properties of each type of circuit in terms of voltage, current and overall resistance. then explain which type of circuit would be better for most households and why. in your answer be sure to explain what happens in terms of voltage and current as components are added to a circuit (parallel and series) use complete sentences and proper scientific terminology
Answer: The difference in charge between two places is known as voltage. The passage of charge is measured as current. A material's propensity to oppose the passage of charge is known as resistance (current).
Explanation:
See Ohm's Law in which it describes the connection between current, voltage, and resistance. This asserts that, given the temperature is constant, the current flowing in a circuit is directly proportional to the applied voltage and inversely proportional to the circuit resistance. According to Ohm's Law, current is exactly proportional to voltage I = v/r).
Hope this helps:)
How does magnetic energy transform into
kinetic energy
Answer:
Magnetic energy can be transformed into kinetic energy in a variety of ways.
Explanation:
One way that this occurs is through electromagnetic induction. This occurs when a changing magnetic field induces an electric current in a conductor, such as a wire. This induced current creates a force that can move the conductor, thus transforming the magnetic energy into kinetic energy. This process is used in electric generators, which convert the kinetic energy of a turbine into electrical energy by turning a coil of wire inside a magnetic field.
Another way that magnetic energy can be transformed into kinetic energy is through the operation of an electric motor. An electric motor uses the interaction between a magnetic field and an electric current to create a force that can rotate a shaft, thus transforming the electrical energy into kinetic energy. Electric motors are used in a wide range of applications, including transportation, manufacturing, and household appliances.
Magnetic energy can also be transformed into kinetic energy through magnetohydrodynamics (MHD), which involves the interaction of a fluid with a magnetic field. When a fluid such as a gas or liquid moves through a magnetic field, it can generate a force that can propel the fluid, thus transforming the magnetic energy into kinetic energy. This process is used in some forms of propulsion, including maglev trains and MHD generators.
In summary, magnetic energy can be transformed into kinetic energy through the interaction of a magnetic field with a conductor, an electric current, or a fluid, which creates a force that can move an object, thus transforming the magnetic energy into kinetic energy.
A bowling ball is dropped off of the side of a building. Ignore the effects of air resistance. As the ball continues to fall freely, the kinetic energy of the ball.
The ball continues to fall, its kinetic energy will increase.
What is kinetic energy?Kinetic energy is the energy an object possesses due to its motion. It is the energy associated with an object’s speed and mass, and is the energy that an object has because of its movement. Kinetic energy can be converted into other forms of energy, such as heat, light, or sound. It can also be used to do work, such as moving objects or powering machines. Kinetic energy is a form of mechanical energy, which is energy that is associated with the motion or position of an object. Kinetic energy is related to the work done on an object, and it increases as the object’s speed increases. Kinetic energy can be calculated using the formula KE = ½mv2, where m is the mass of the object and v is the velocity of the object.
The kinetic energy of the ball will increase as it falls, because it is gaining speed due to gravity.
As it falls, it accelerates at a rate of 9.8 m/s^2, and its kinetic energy is equal to its mass multiplied by the square of its velocity.
Therefore, as the ball continues to fall, its kinetic energy will increase.
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A 5.28 kilogram bowling ball traveling 6.5 m/s east collides head-on with a 3.45 kilogram bowling ball traveling 12.0 m/s west. Determine the magnitude
of the total momentum of the two ball system after the collision.
The momentum of an isolated system before and after a collision must equal each other, according to the law of conservation of momentum.
In a collision, why does momentum remain constant?The only thing that happens when two bodies collide is that their momentum changes. Thus, for bodies colliding, changes in momentum are always equal and opposite. The momentum of the other body must decrease by the same amount if the momentum of the first body increases. As a result, momentum always remains constant.
In every collision, is momentum always conserved?Regardless of the type of collision, momentum is always conserved. Although mass is conserved regardless of the type of collision, an inelastic collision may cause the mass to deform, leading to the two possibilities.
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Kamala made a table to describe parts of the electromagnetic spectrum. A 3-column table with 4 rows. The first column labeled wave has entries visible, microwaves, infrared, gamma rays. The second column labeled frequency has entries medium, low, low, very low. The third column labeled wavelength has entries medium, long, long, very short. What mistake did kamala make? gamma rays should have a very high frequency, not a very low frequency. Visible light should have a low frequency and a long wavelength. Infrared light should have a short wavelength, not a long wavelength. Microwaves should have a high frequency and a short wavelength.
The mistake that Kamala made from the table is that Gamma rays should have a very high frequency, not a very low frequency.
The electromagnetic spectrum is what?The grouping of electromagnetic radiations in the electromagnetic spectrum is done according to diminishing or increasing frequency or wavelength.
The following are some examples of electromagnetic radiations depending on increasing wavelength:
Gamma raysX raysultrasound wavesobservable lightIR radiationMicrowaveswaves on radioHow do gamma rays work?These are the radiation waves produced by the radioactive disintegration of atomic nuclei.
These rays have high frequencies. The frequency happens 1019 times every second.
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Answer: gamma rays should have a very high frequency, not a very low frequency.
Explanation:
A solid cube of mass 87 kg and edge length 0.95 m rests on a horizontal floor as shown below. A person then pushes on the upper edge of the cube with a horizontal force of magnitude F. At what value of F will the cube start to tip? Assume the frictional force from the floor is large enough to prevent the cube from sliding.
The force required to tip the cube is equal to the coefficient of static friction times the weight of the cube.
fx=μs * 87 kg * 9.8 m/s^2
What is the force required to tip the cube?Generally, The cube will start to tip when the net torque about the point of contact between the cube and the floor is equal to zero. The torque is given by:
torque = force x distance from axis of rotation
The distance from the axis of rotation is half the edge length of the cube (0.475m), and the force is the force applied by the person (). Therefore, the torque is:
torque = fx x 0.475
For the cube to tip, the torque due to the person's force must be greater than the maximum torque the friction can provide, which is the friction force times the distance from the axis of rotation.
The maximum torque provided by friction is:
friction torque = friction force x 0.475
Since the friction force is equal to the normal force (mg) multiplied by the coefficient of static friction (μs), the maximum torque provided by friction is:
friction torque = μs * mg * 0.475
where m is the mass of the cube, g is the acceleration due to gravity and μs is the coefficient of static friction between the cube and the floor.
So, we can find the force needed to tip the cube by equating the torque due to the force with that of the friction torque.
Fx*0.475 = μs * m * g * 0.475
Fx= μs * m * g
Fx= μs * 87 kg * 9.8 m/s^2
Note: The coefficient of static friction (μs) is a dimensionless quantity between 0 and 1, it varies depending on the surfaces in contact.
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A block on the end of a spring is pulled to position x = a and released from rest. In one full cycle of its motion, what total distance does the block travel?.
The total distance that block travel is 4 A.
How to find the total distance does the block travel?In one full complete cycle of a motion. The block will move back and forth from its original position. Because of the block is pulled to the position x = A, we can say the initial distance travelled = A. When the block is released from the others after being pulled. The cycle = A + A + A = 3A. To hit one full cycle of its motion, the block has to travel, so,
the total distance = 3A + A = 4A
Hence, it is confirm that the total distance the block travel is 4A
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How can a protective device minimizethe magnitude of the net
force acting on an egg in a cart during a collision?
A protective device such as an egg carton, foam padding, or bubble wrap can be used to minimize the magnitude of the net force acting on an egg in a cart during a collision by providing cushioning some of the impact.
What is magnitude?
Magnitude refers to the size or scale of an object, event, or phenomenon. It is typically used to describe the intensity or amplitude of a physical quantity, such as the strength of an earthquake or the brightness of a star. Magnitude is also used to quantify the size of a population, the severity of an economic downturn, or the power of a political movement. Magnitude is usually expressed as a numerical value, such as a number on a Richter scale or a magnitude rating on a star catalog. Magnitude can also be expressed in terms of a relative or subjective scale, such as a rating of “strong” or “weak” for an earthquake. Magnitude is often used in scientific research to quantify the size of a phenomenon, such as the magnitude of climate change or the magnitude of a new medical breakthrough.
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Calculator
An object is placed 4m above ground. The object has a mass of 4kg and the gravitational potential energy stored is 3J.
What is the gravitational field strength experienced by the object?
Give your answer to 2 decimal places.
Thus, g = GPE / (m*h) = 3 / (4*4) = 0.75 m/s2. Therefore, the gravitational field strength experienced by the object is 0.75 m/s2.
What is gravitational field strength?
Gravitational field strength is a measure of the gravitational force per unit mass at a given location in space.It is typically measured in Newtons per kilogram (N/kg) or meters per second squared (m/s2). Gravitational field strength is an important concept in understanding the effects of gravity on objects and how it affects their behavior.
It is represented by the symbol g and is calculated by dividing the gravitational force by the mass of an object. It is typically measured in units of meters per second squared (m/s2).
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What are the main disadvantages for alternative energy sources solar biomass wind geothermal and hydropower )?
Disadvantages of renewable energy
Renewable energy has many benefits, but it’s not always sunny when it comes to renewable energy. Here are some cons of renewable energy when compared to traditional fuel sources:
Renewable energy has high upfront costs Renewable energy is intermittent Renewables have storage capabilities Renewable energy sources have geographic limitations Renewables aren’t always 100% carbon-freeRenewable energy typesThe increasing use of energy sources makes people to find other options than the current energy sources. The types of renewable energy are as follows.
SolarThis type of energy comes from the process of capturing solar radiation or sunlight, then converting it into electricity, heat, or hot water. To get electricity, the sun's heat will be absorbed using solar panels (solar panels) and then convert it into electricity.
Wind energyWind is moving air. Wind has long been used as a source of energy. For example in the Netherlands, the wind is used to drive a pinwheel. This kincie serves as a source of grain processing equipment. Currently, electricity is also able to generate electricity by utilizing turbines. This turbine is used to drive a generator that generates electricity.
Tidal energyThis energy is obtained from the results of the tides. It is known, this type of energy is also used on the east coast of America and Europe. The turbines installed on the waterfront help convert energy from the tides into mechanical energy to grind grain.
Wave EnergyThis type of energy is used to generate electricity. It's just that developing wave energy requires infrastructure with a relatively high cost.
Ocean thermal energySea water has a temperature difference where the inside of the sea water feels cold and the surface of the sea water feels hot because it is exposed to sunlight. This temperature difference is used to generate electrical energy using advanced technology.
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calculate the movement of a 2000-kg truck travelling 19m/s. show your work
Answer: 38000N
Explanation:
Movement -> inertia -> force -> rate of change of momentum
Momentum = mv
= mass x velocity
= 2000 x 19
= 38000N
Answer:
38,000 kg·m/s
Explanation:
Did you mean "momentum"? If so, here is the solution:
Momentum = p = mv = (2000 kg)(19 m/s) = 38,000 kg·m/s
A race car travels at a speed of 95 m/s.
How far does it travel in 12.5 s?
Answer: 1200m
Explanation:
Is DNA the nucleic acid that carries genetic information?
Deoxyribonucleic acid (DNA) is the nucleic acid that carries genetic information in the human body.
Deoxyribonucleic acid or DNA is the molecule that carries the genetic information for the development and functioning of an organism in the human body. DNA is made of two connected strands that wind around each other to resemble a twisted ladder -a shape referred to as a double helix. Thus, DNA is the nucleic acid that performs the function of carrying genetic information that is to be transferred from one generation to the next generation.
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A 6-kg bowling ball sits on top of a building that is 120 meters tall.
Circle one: KE / GPE / both
Show your work for finding the values of each type of energy the object has:
The gravitational potential energy of the bowling ball is 7,056 J.
What is the gravitational potential energy of the bowling ball?The gravitational potential energy of the bowling ball is calculated by applying the following formula;
P.E = mgh
where;
m is the mass of the bowling ballh is the height of fall of the bowlingg is acceleration due to gravityP.E = ( 6kg x 9.8 m/s² x 120 m )
P.E = 7,056 J
Thus, the gravitational potential energy of the bowling ball is the energy possessed by the ball due to its height above the ground level.
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How long before the expansion of the universe causes our earth to drift away from the sun?
The expansion of the universe does not affect the relative position of astronomical bodies within galaxies.
What is the universe?The universe is described as all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
We know for a fact that the universe is expanding, but this does not alter the distance between the earth and the sun. It also does not have a bearing from the distance between atoms.
The expansion of the universe is known to be partly caused by the Big Bang, and partly caused by dark energy.
The stars are more or less static relative to a spacetime fabric that is itself expanding, hence the expansion should not be thought of as stars flying away from each other in a static spacetime fabric.
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Answer:
The relative location of astronomical bodies within galaxies is unaffected by the expansion of the universe. True, the cosmos is expanding, but this has no effect on the distance between the Earth and the Sun.
Explanation:
a body travels from rest with acceleration 8ms-2. Find it velocity when it has covered a distance of 100meters
40 m/s
We have the equation of motion v^2-u^2= 2as ------------- ( i)
where v = final velocity which is unknown let it be x m/s
u = initial velocity which is 0 m/s ...( The body starts from rest )
a = Acceleration gained by body = 8 m/s^2
s stands for distance covered in till v velocity which is 100 meters.
So by using equation( i)
x^2- 0 = 2*100*8x^2 = 1600x = Sqrt(1600)x = 40So the velocity of the body will be 40 m/s when it had a covered distance of 100 meters.
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Three objects with a mass of M exert gravitation forces on each other. What is the direction of the net force on mass B? Explain your reasoning.
When three objects with a mass of M exert gravitation forces on each other, the direction of the net force on mass B will vary according to position of three masses.
What is gravitation?
The force of attraction between any two bodies is known as gravitation. There is an attraction between every thing in the cosmos, but most of the time it is too faint to be noticed due to the extreme distance between the objects.
Along the line connecting the centers of the two bodies, the gravitational force acts. Hence, the direction of the net force on mass B will vary according to position of three masses.
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