Newton's third law does not hold always true.
Newton's third law, also known as the law of action and reaction, states that for every action force, there is an equal and opposite reaction force. This means that if object A exerts a force on object B, object B will exert an equal and opposite force on object A.
This is often demonstrated with examples such as a person pushing a wall or a rocket being propelled forward by the force of its exhaust.
One exception to this law is when forces such as friction and air resistance act on an object. These forces are not equal and opposite to the action force and can cause the reaction force to be less than the action force.
Another exception is when Newton's laws are applied in the realm of quantum mechanics, the laws of classical mechanics such as Newton's laws, no longer hold true.
In the quantum world, particles don't have definite positions or velocities, and they can exist in multiple places at once. As a result, the laws of classical mechanics do not apply to the quantum world.
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What is angular momentum Mcq?.
The angular momentum of a particle rotating around an axis is defined as the moment of the particle's linear momentum around that axis.
What is angular momentum?Angular momentum is the rotational equivalent of linear momentum in physics. It is an important physical quantity because it is a conserved quantity—in a closed system, the total angular momentum remains constant. Both the direction and magnitude of angular momentum are conserved. The property of any rotating object given by moment of inertia times angular velocity is defined as angular momentum. It is the property of a rotating body determined by the product of the rotating object's moment of inertia and angular velocity.
Here,
The moment of a particle's linear momentum about an axis is defined as its angular momentum. The product of linear momentum and the perpendicular distance of its line of action from the axis of rotation is used to calculate it.
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Assume that you have a meter stick balanced on a pivot, and pile of additional masses that you can hang on the meter stick. What is the minimum number of additional masses that you need to hang from the meter stick in order to determine the mass of the meter stick itself?.
You will not need any mass to determine the mass of the stick to determine the mass of the meter stick itself.
What is center of mass of a system of particles?A place at which the entire mass of the object or all of the masses of a system of particles appears to be concentrated is considered the center of mass of a body or system of particles.
Only Newton's second law, that also states that an item's mass is equal to its force divided by its mass, may be used to calculate its mass of the object, such as the stick. It is clear that we are unable to determine both force and acceleration values of the stick depicted in the question above. However, by adding more masses on the stick, it is also difficult to determine its mass.
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What is momentum and write its formula?.
Momentum is a moving body's quantity of motion, measured as the product of its mass and velocity. It is calculated as mass *velocity.
What is momentum?Momentum is defined as the quantity of motion of a body. It is measured by "mass velocity," since momentum is affected by velocity and the direction of the body's motion. Because velocity is a vector and mass is a scalar variable, momentum is a vector quantity. Momentum is defined as mass multiplied by velocity. The definition of momentum is "mass moving." Because all objects have mass, when they move, they have momentum - their mass is in motion. Momentum is a moving body's quantity of motion, measured as the product of its mass and velocity.
Here,
Momentum is a moving body's amount of motion, calculated as the product of its mass and velocity. It is calculated as mass *velocity.
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What is the unit of the distance Mcq?.
According to the International System of Units, the SI unit of distance is a metre. Surprisingly, by using this as the base unit and some equations, many other derived units or quantities such as volume, area, acceleration, and speed are formed.
What is distance?The magnitude or size of displacement between two positions is defined as distance. It is important to note that the distance between two points is not the same as the distance traveled between them. The total length of the path traveled between two points is referred to as the distance traveled. The total length of an object's actual path is referred to as distance. The displacement of an object between two points is the straight line (shortest) distance between those points, directed from one position to the other. The SI unit for measuring distance and displacement is the meter (m).
Here,
According to the International System of Units, a metre is the SI unit of distance. Surprisingly, by using this as the base unit and some equations, many other derived units or quantities, such as volume, area, acceleration, and speed, can be formed.
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How do you find velocity at time t 0?.
When an object doesn't move over time, its velocity is zero. When there is no displacement of the item, the velocity of the object is 0. Between two different time intervals, the object's position is unchanged.
By dividing the entire distance traveled by the time it took the object to go a certain distance, you may calculate the object's initial velocity. V, d, and t are the three variables that make up the equation V = d/t.
Angular acceleration at time zero is -10 rad/s2, and the angular velocity is 27.5 rad/s. How many complete rotations does the disc make before coming to a stop. The circular path is always parallel to the linear velocity. The tangential speed determines magnitude.
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Correct Question:
How do you find velocity at time t=0?.
the student explains how conduction is the charging by contact so the uncharged object takes select one type of charge; while induction is the charging without contact so the uncharged object takes select one type of charge.
Conduction is the charging-by-contact method of charging where the uncharged object takes C: the same type of charge; while induction is the charging-without-contact method of charging where the uncharged object takes A: the opposite charge.
Charging by conduction means to charge an uncharged object by placing it in contact with a charged object. Charging by induction means charging an uncharged object by bringing it close to a charged object without allowing the two objects to come into contact. In conduction, any new currents produced follow the original currents. On contrary, in induction, the new currents induced opposing changes in the original currents.
"
Complete question:
the student explains how conduction is the charging by contact so the uncharged object takes select one type of charge; while induction is the charging without contact so the uncharged object takes select one type of charge.
A- the opposite charge
B - the neutral charge
C - the same type of charge
D - No charge
"
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carlos is deciding if he will climb a mountain in a zigzag path or straight up the side, starting from rest and ending at rest. neglecting friction and disregarding other factors, will his potential and kinetic energy consumption be the same for both paths?
No, his potential and kinetic energy consumption will not be the same for both paths.
What is kinetic energy?Kinetic energy is a form of energy associated with the movement of objects or particles. It is the energy of an object in motion, and is equal to the work done to accelerate the object from an initial state of rest. Kinetic energy is a scalar quantity, meaning it has magnitude but no direction.
No, his potential and kinetic energy consumption will not be the same for both paths. Climbing a mountain in a zigzag path will require more energy than climbing straight up the side, because he will have to change his direction and velocity, requiring more energy for acceleration and deceleration. Furthermore, it will take longer to reach his destination, resulting in more energy expended.
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What is the formula and unit of work done?.
Answer:
Work Done = Force x Displacement
Explanation:
The formula for work done is defined as the product of the magnitude of the force applied on an object and the displacement of the object in the direction of the force. Mathematically, this is expressed as:Work Done = Force x DisplacementThe unit of work done is the joule (J). This is derived from the SI unit for force (Newton, N) and the SI unit for displacement (meters, m). The joule is defined as the amount of energy transferred or converted when a force of one newton moves an object one meter in the direction of the applied force.Work is a measure of energy being transferred or converted from one form to another. This transfer of energy is accomplished by applying a force onto an object over a distance. Work done is measured in joules, which is the amount of energy transferred or converted in the process. It is important to note that for work to be done, the force must be applied in the direction of the displacement. For example, if you push a box across the floor, the force you apply is in the direction of the displacement. This means that work is being done on the box. However, if you push the box up against a wall, the force you apply is perpendicular to the displacement. In this case, work is not done on the box because the force is not applied in the direction of the displacement.In addition, it is important to remember that work done is equal to the product of the force applied and the displacement of the object in the direction of the force. This means that if the force applied is doubled, the work done will also be doubled. Similarly, if the displacement of the object is doubled, the work done will be doubleIn conclusion, the formula for work done is Force x Displacement, and the unit of work done is the joule. Work is a measure of energy being transferred or converted from one form to another, and is equal to the product of the magnitude of the force applied and the displacement of the object in the direction of the force. In order for work to be done, the force must be applied in the direction of the displacement.What is an example of latency?.
Some common examples of latency are while playing games, audio processing.
Latency is the delay or lag time between when a request is made and when a response is received. An example of latency can occur in network communications, where data packets are sent from one device to another and there is a delay between when a packet is sent and when it is received. Another example of latency can occur in computer systems, where there is a delay between when a command is given and when the computer completes the task. An example of latency can occur while playing online games, where there is a delay between when a player takes an action and when that action is reflected on other player's screens, this is known as "ping". Another example of latency can be seen in audio processing, where there is a delay between the time a sound is made and when it is heard by the listener.
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How does that affect how the sun and moon appear as seen from Earth? A. The sun appears to be four times the size of the moon. B. The sun and the moon appear to be nearly the same size. C. The full moon appears to be twice as large as the sun. D. The sun appears to be 400 times the size of the moon.
B. The sun and the moon appear to be nearly the same size.
The Sun and the Moon appear to be nearly the same size from the Earth's perspective because the Moon is about 400 times closer to the Earth than the Sun, and the Sun is about 400 times larger than the Moon. This means that the Sun and the Moon appear to have the same size in the sky, which makes possible the phenomenon of a solar eclipse, where the Moon completely covers the Sun. Even though the sun is much larger than the Moon, but its distant location makes it appear small in the sky while the Moon is much smaller but it is much closer to us, that's why they appear to be the same size.
The board is subjected to a tensile force of 200 lb. determine the average normal and average shear stress in the wood fibers, which are oriented along plane a–a at 20° with the axis of the board.
The normal stress is 2.92 psi and shear strength is 8.034 psi.
It is necessary to determine the normal stress and shear stress for plane a-a , which is in relation to the direction of the force at an angle 20°. We apply the conditions of equilibrium:
∑[tex]F_{x} =0[/tex]∑[tex]F_{y} = 0[/tex]Using these equations we get :
∑[tex]F_{x} = 0[/tex] ⇒ V - 200. cos20° = 0
⇒ V = 187.938 lb
∑[tex]F_{y} = 0[/tex] ⇒ N - 200. sin20° = 0
⇒ N = 68.40 lb
We calculate the surface area of the cross section:
A = b.d/ sin20
= 2*4/sin20
= 23.39
The shear strength is calculated by formula:
Normal stress = N/A , where
N = Force acting on cross section
A = Surface area of the cross section
i.e. Normal stress = 68.40/23.39 = 2.92 psi
The shear strength is calculated by formula:
Shear strength = V/A, where
V = Shear force acting on cross section
A = Surface area of the cross section
i.e. Shear strength = 187.93/23.39 = 8.034 psi
So, the normal stress is 2.92 psi and shear strength is 8.034 psi.
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What is the efficiency of a light bulb if it produces 30j of light energy, with an input of 120j of electrical energy?
The efficiency of this light bulb is 25% .
How do you calculate the efficiency of a light bulb?Utilizing the following formula, efficiency may be represented as a ratio: output input. The total quantity of beneficial work accomplished, excluding waste and spoilage, is known as output or work output. Efficiency may also be expressed as a percentage by dividing the ratio by 100.To represent the result as a percentage, divide the output by the input and then multiply by 100. Although both work and energy are measured in terms of the Joule, the calculator above has a space for a different unit. Make sure the energy and labour units are equivalent.Efficiency is essentially a measurement of the amount of labour or energy that may be saved throughout a process. In other words, it's similar to comparing the energy intake and output in any particular system.Given data :
output = 30j
Input = 120j
Efficiency = output / input x 100
= 30 / 120 x 100
= 25%
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What is the wavelength of a wave traveling through a rope if the distance from one crest to the next is 1 m?
A. 0.5 m
B. 1 m
C. 3 m
D. 2 m
The distance between the first crest (or trough) and the following crest is known as a wave's wavelength (or trough). In this instance, the distance between each crest is specified as 1 m. The wave's wavelength is therefore 1 m.
What is the wavelength that traveling through a rope?It is important to note that the wavelength is not the same as the amplitude, which is the distance from the crest (or trough) to the center of the wave. The amplitude is a measure of the strength or intensity of the wave, while the wavelength is a measure of its spatial periodicity.Additionally, it is also important to note that the wavelength and frequency of a wave are inversely related. This relationship is described by the equation: v = fλ, where v is the velocity of the wave, f is the frequency, and λ is the wavelength.To learn more about wavelength refer:
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Consider a projectile motion formed by inclined throw then answer the following. b) For which of the angle it takes more time in air?
Answer:Projectile motion is the motion of an object thrown (projected) into the air. After the initial force that launches the object, it only experiences the force of gravity. The object is called a projectile, and its path is called its trajectory. As an object travels through the air, it encounters a frictional force that slows its motion called air resistance. Air resistance does significantly alter trajectory motion, but due to the difficulty in calculation, it is ignored in introductory physics.
Explanation:
B)
What are Newton's 1st 2nd and 3rd laws formulas?.
Three formulas of newton's law of motion are:- a) v = u + at, b) S = ut +0.5at² c) v² = u² + 2as
Newton's first law of motion defines the relation between final velocity(v) of an object after some time(t), if the initial velocity of the object is u and acceleration is a.
v = u + at
Newton's second law of motion is used to determine the distance(S) travelled by an object in accelerated motion for time(t), having an initial velocity u.
S = ut +0.5at²
Newton's third law gives the relationship between, final, initial velocities, acceleration(a), and the distance(s) travelled by the object.
v² = u² + 2as
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what will be the acceleration, if the vehicle starte form rest and the velocity reaches 30m/s and after 6 sec
Explanation:
Acc=change in velocity/time
a=30-0 / 6
a =30/6
a = 5m/s^2
What is the full form of SI units Class 6?.
The International System of Units (SI unit) is a scientific method of expressing the magnitudes or quantities of significant natural phenomena. SI units include the kilogram, second, ampere, and kelvin, among others.
What is SI units?The International System of Units, abbreviated SI in all languages and sometimes pleonastically as the SI system, is the modern version of the metric system and the world's most widely used measurement system. The SI is a coherent system of measurement that begins with seven base units: the second (symbol s, the unit of time), the metre (m, length), the kilogram (kg, mass), the ampere (A, electric current), the kelvin (K, thermodynamic temperature), the mole (mol, substance amount), and the candela (cd, luminous intensity).
Here,
The International System of Units (SI unit) is a scientific system for expressing the magnitudes or quantities of major natural phenomena. SI units include the kilogram, second, ampere, kelvin, and so on.
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What is time travel and is it possible?
Answer:
According to NASA, time travel is possible, just not in the way you might expect. Albert Einstein's theory of relativity says time and motion are relative to each other, and nothing can go faster than the speed of light, which is 186,000 miles per second. Time travel happens through what's called “time dilation.
Explanation:
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1000 joules of energy are put into a pulley system, and 400 joules come out. What does the law of conservation of energy imply about the lost energy?(1 point).
The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another.
What is energy?Energy is the ability to do work. It is the capacity to cause change or to make things happen. Energy is present in many forms, such as thermal energy, radiant energy, electrical energy, chemical energy, mechanical energy, and nuclear energy. Energy is stored in different forms, such as potential energy, kinetic energy, and elastic energy.
The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another. Therefore, the 600 joules of energy that were lost in the pulley system must have been converted into a different form of energy, such as heat or sound.
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Uppoe a rocket-propelled motorcycle i fired from ret horizontally acro a canyon 1. 00km wide. What minimum contant acceleration in the x-direction mut be provided by the engine o the cycle croe afely if the oppoite ide i 0. 750 km lower than the tarting point?
To safely cross a canyon 1.00 km wide with a starting point 0.750 km lower than the opposite side, the minimum constant acceleration in the x-direction that must be provided by the engine of the motorcycle is 9.8 m/s² (approximately the acceleration due to gravity).
Rocket Motorcycle Canyon CrossingThe motorcycle must have a minimum constant acceleration in the x-direction of 9.8 m/s² in order to safely cross the canyon. This acceleration is necessary to counteract the force of gravity and ensure that the motorcycle and rider can clear the distance of the canyon and land on the opposite side at a point that is 0.750 km higher than the starting point. The motorcycle is assumed to be fired horizontally from the starting point, and the rider must be able to maintain balance throughout the crossing.
To safely cross a canyon 1.00 km wide with a starting point 0.750 km lower than the opposite side, the minimum constant acceleration in the x-direction that must be provided by the engine of the motorcycle is 9.8 m/s² (approximately the acceleration due to gravity). This is assuming that the motorcycle is fired horizontally from the starting point and that the rider is able to maintain balance throughout the crossing.
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Samples g and h were selected from the same population of quantitative data and the mean of each sample was determined. The mean of sample g is equal to the mean of the population.
The mean of the sample is point estimator of mean of the population from which samples are drawn randomly.
Correct option: II and III is correct choice.
What is the relationship between population mean and sample mean?Samples G and H are selected from the same population of quantitative data. Mean of G is equal to the mean of the population. We cannot work on population in most of the cases thus we draw samples and work on sample to predict the properties of population. Sample mean is point estimator of population mean, and is used to predict the population mean.
Since both G and H are samples drawn from same population, thus, they both are point estimators of the population mean. It is not necessary that both G and H must be same. They can be same and cannot be same.
Thus, Option: II and III is correct choice
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The complete question is as follows:
Samples G and H were selected from the same population of quantitative data and the mean of each sample was determined. The mean of sample G is equal to the mean of the population. Which of the following statements must be true?
I. The mean of sample H must also be equal to the population mean.
II. The mean of sample G, TG, is a point estimator for the mean of the population.
III. The mean of sample H, my, is a point estimator for the mean of the population.
A. I only
B. II only
С. III only
D. I and II
E. II and III
A 2. 74 kg object and changes velocity by 16. 49 m/s in 16. 19 s. How large of a force acted on the object? Which choice represents the best formula to calculate this answer?
The force on the object is 0.822 N.
Forces affect the motion of objects. They can cause movement. You can also slow down, stop, or change the direction of objects that are already moving. We say that a force changes its velocity because it changes the speed or direction of an object. Remember that acceleration is a change in velocity. F= mdv / dt
So m= 2.74 kg and dv= 16.49-16.19 = 0.30.
If time is 1 second,
F=2.74*0.3
= 0.822N
Therefore, the force on the object is 0.822 N.
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How much is 1 newton?.
A basic truth of inheritance that had been known well before darwin's time was that.
A basic truth of inheritance that had been known well before Darwin's time was that: Offspring frequently resemble their parents AND they inherit genes from their parents.
What is inheritance?Assets left to a person's heirs after their death are referred to as inheritance. Cash, investments like stocks or bonds, and other things like jewellery, cars, works of art, antiques, and real estate can all be included in an inheritance. Evolutionary transformation requires genetic inheritance. It explains how genes are transmitted down across generations. Therefore, it may initially appear odd that life history research rarely takes into account genetic inheritance. The most widespread types of inheritance include autosomal dominant, autosomal recessive, X-linked dominant, X-linked recessive, multifactorial, and mitochondrial inheritance. Traits that are determined by the genes found on the autosomes are referred to as "autosomal."
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The complete question is as follows:
A basic truth of inheritance that had been known well before Darwin's time was that Select one:
a. Offspring inherit genes from their parents.
b. selective breeding improves domesticated plants and animals
c. Offspring frequently resemble their parents AND they inherit genes from their parents
d, Offspring frequently resemble their parents.
111. When a meteorite strikes Earth, the meteorite or its pieces remain on or near Earth's surface. Suppose a giant object from space enters the solar system and collides head-on with Earth as Earth travels in its path around the Sun.
If the object's speed is twice Earth's speed, how massive must it be to reduce Earth's orbital velocity by even a hundredth of a percent? Annotate your calculation with a description of your approach.
Answer:
Explanation:
To calculate the mass of an object that would reduce Earth's orbital velocity by even a hundredth of a percent, we need to use the conservation of momentum principle. According to this principle, the total momentum of a system remains constant if no external forces act on it.
In this scenario, we can consider the Earth and the object as a closed system. The initial momentum of the system is Earth's momentum, and the final momentum is Earth's momentum after the collision.
Let's assume the mass of the Earth is M_E and the initial velocity of Earth is V_E. After the collision with the object, the final velocity of Earth is V_E' . The mass of the object is M_O, and its velocity is V_O (twice Earth's velocity)
The conservation of momentum principle states that:
M_E * V_E = M_E * V_E' + M_O * V_O
To reduce Earth's orbital velocity by even a hundredth of a percent, we can assume that V_E' = V_E - (0.0001 * V_E)
Therefore,
M_E * V_E = M_E * (V_E - (0.0001 * V_E)) + M_O * (2 * V_E)
Rearranging this equation we can find the mass of the object M_O
M_O = M_E * (V_E / (2 * V_E - 0.0001 * V_E))
To get the exact mass of the object, we need to know the mass of the Earth and the velocity of Earth, which are not provided in the question. However, this calculation will give an approximate mass that the object would need to have in order to reduce Earth's orbital velocity by even a hundredth of a percent.
how many days did the trekkers predict it would take them to walk from phakding to everest base camp
It will take about 12 days for the trekkers predict to walk from phakding to Everest base camp.
What is Trekking?This is referred to as a form of movement which consists of walking for several days or several weeks and being entirely or partially self-sufficient.
The standard Everest Base Camp Trek is 130km round trip and is usually divided into 12 days which includes time and space for acclimatization to the region and then we have 8 days to get to Everest Base Camp and 4 days to get back which is therefore the reason why ythe predicted days will be 12 and is the correct choice.
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What is the name for the spontaneous process of transport or dispersing of molecules until there is a uniform concentration of molecules throughout a solution?.
The process by which molecules spontaneously move through a solution or disperse until they are evenly distributed throughout is known as diffusion.
Diffusion is the movement of molecules (either solution- or gas-borne particles) from a region of high concentration to a region of lower concentration, or down a gradient in concentration. Diffusion over the cell surface membrane allows some chemicals to enter and exit cells.
The term "facilitated diffusion" refers to a type of passive transport. It happens when chemicals like glucose or amino acids shift from a state of high concentration to a state of low concentration with the help of carrier proteins or membrane pores.
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How do I reduce network latency?.
You need to follow some steps in order to reduce Network latency and improve your network performance.
Follow steps below to ensure Network latency reduction:
Identifying the source of latency: The first step in reducing network latency is to identify where the latency is coming from. This can be done by running a network analysis tool or by monitoring the network for bottlenecks.
Optimizing network infrastructure: Once the source of latency is identified, it is important to optimize the network infrastructure to reduce latency. This can include upgrading network devices, such as routers and switches, to improve performance, and optimizing network protocols to reduce overhead.
Minimizing distance: The distance data has to travel is a major contributor to latency. Reducing the physical distance between devices can greatly reduce latency.
Here are some other steps:
Optimizing routing: The routing of data is another important factor in reducing latency. By optimizing the routing of data, it is possible to reduce the number of hops it has to take, thereby reducing latency.
Caching and Content Delivery Network (CDN): Caching frequently accessed data can reduce the time it takes to access that data, thus reducing latency. Using a Content Delivery Network (CDN) can also help to reduce latency by replicating content to servers that are closer to the user.
Quality of Service (QoS) Policies: Implementing Quality of Service (QoS) policies can help to ensure that important data is prioritized, thus reducing latency.
TCP Optimization: By optimizing TCP settings like window size, it is possible to increase the amount of data that can be transferred at once, reducing the number of packets sent and received, thus reducing latency.
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How do you calculate torque from inertia?.
Torque τ can be calculated using moment of inertia I and angular acceleration α.
Mathematically, τ = I α
Angular acceleration of a body is due to rotational motion. Moment of inertia is the tendency of the body to restrain the angular acceleration of that body. Torque is an analogous quantity to work and energy.
The steps to calculate torque from moment of inertia are given as, determine the known values such as the angular acceleration and the moment of inertia for the object in question, determine what unknown value we are trying to find, determine which equations we will need to solve for the unknown value and rearrange it if necessary, calculate the desired unknown value.
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two identical metal spheres a and b are in contact. both are initially neutral. 1.0×1012 electrons are added to sphere a, then the two spheres are separated. t or f
Two identical metal spheres a and b are in contact, both are initially neutral. When 1.0×1012 electrons are added to sphere a, then the two spheres are separated : false
What is Charge?The physical property of matter that causes it to experience a force when placed in an electromagnetic field is called as electric charge.
When 1.0x1012 electrons are added to sphere a, then that sphere becomes negatively charged. When two spheres are separated, electrons will redistribute themselves to maintain equilibrium. This results in both spheres having net charge. Some of the electrons from sphere a will move to sphere b, making it negatively charged.
So, when 1.0×1012 electrons are added to sphere a, then the two spheres are separated is false.
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