the force of gravity on the average person is about 700 n at the earth's surface. calculate the gravity on a person 10 times that distance from the center of the earth

The mean free time between collisions for aluminum wire is

1.62 * 10^-20 s and the mean free time between collisions for Iron is

1.68 * 10^-20 s.

Electrons are subatomic particles that carry a negative electrical charge. They are found outside the nucleus of an atom and are responsible for chemical reactions, electrical conductivity, and magnetism.

The mean free time between collisions for electrons in a metal wire can be calculated using the mean free path (λ) and the electron density (n) of the metal. The mean free time between collisions is given by the equation:

τ = λ / v

Where τ is the mean free time, λ is the mean free path, and v is the velocity of the electrons.

Using the formula, we can calculate mean free path:

λ = 1 / (n * σ)

Where σ is the collision cross-section, which is a measure of how likely it is for an electron to collide with an atom in the metal.

For aluminum, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.49 * 10^28 * 2.82 * 10^-15) = 3.51 * 10^-14 m

For aluminum, the mean free time between collisions is:

τ = λ / v = 3.51 * 10^-14 m / (2.18 * 10^6 m/s) = 1.62 * 10^-20 s

For Iron, the mean free path is approximately:

λ = 1 / (n * σ) = 1 / (8.05 * 10^28 * 2.82 * 10^-15) = 3.65 * 10^-14 m

For Iron, the mean free time between collisions is:

τ = λ / v = 3.65 * 10^-14 m / (2.18 * 10^6 m/s) = 1.68 * 10^-20 s

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Answer:

D(displacement) = 3 km E + 1 km W + 2 km W = 0

Total displacement (vector) = 0

Total displacement (scalar) = 6 km

magnitude implies a total displacement of 6 km

Answer:

3.08

Explanation:

Force along the third rope is 2F rmABcostheta in magnitude. Newton's second rule of motion is a necessary topic to understand in order to answer this question.

In terms of physics, magnitude is just "distance or quantity." In terms of motion, it shows the absolute or relative size, direction, or movement of an object. It is used to describe something's size or scope. In physics, the term "magnitude" often refers to a size or amount.

How much and which way are answered by the magnitude and direction respectively. As an illustration, the magnitude 5 meters and the direction North. A vector quantity with both magnitude and direction is 5 meters north.

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Velocity is the rate that an object moves in a certain direction.

According to the dictionary, direction refers to how something moves, how to get somewhere in particular, how something is taking shape, or which way you are facing. Direction can be expressed using relative vocabulary, such as up, down, in, out, left, right, forward, backward, or sideways, which compares the location of one thing to another. Velocity is the directional speed of an item in movement as a measure of the rate that its location is changing as seen from a certain view point and as determined by a specific unit of time.

The entire displacement of the object divided by the total time elapsed gives the object's average velocity.

Velocity and speed both refer to how rapidly and in what direction an object moves. Speed in a certain direction is referred to as velocity in physics. It calculates the distance an object travels in a specific length of time. The definition of velocity is the distance that an object travels in one unit of time.

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The speed of the space shuttle is in orbit about the earth at an altitude is calculated to be 7.68 × 10³ m/s.

Given that,  

Satellite's centripetal acceleration a = 8.7 m/s²

Mass of the Earth M = 5.98 × 10²⁴ kg

Gravitational constant G = 6.67 × 10⁻¹¹ m³ kg⁻¹ s⁻²

R is radius of satellite's orbit

v be satellite's velocity

The satellite's centripetal acceleration a = v²/R must be equated to gravitational acceleration GM/R²

v²/R = GM/R²

v² = GM/R

R = GM/ v²

v² = GM/ (v²/a)

v = (GM a)^ 1/4

Putting in the values, we have,

v = (6.67 × 10⁻¹¹ × 5.98 × 10²⁴ × 8.7)^ 1/4 = 7.68 × 10³ m/s

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The value of Ex = - (Q/(4πε0)) *(x/r³), Ey = - (Q/(4πε0)) ×(y/r³), Ez= - (Q/(4πε0)) ×(z/r³) , for the potential due to a point charge Q at origin.

At infinite distance when an electric charge isn't under the influence of the point charge, the potential is defined as zero. Electric potential at a given position is the quantum of work that has to be done to bring the charge at a finite distance from the point charge.So, the electrostatic potential from a point), at a distance r is given by,

U = 1/4πε0Qr

Both theunit charge and the point charge are positive. So, the work has to be done against the electrostatic force. Therefore, the potential is positive. However, still, if the point charge had negative value, then in that case potential would have been negative.

A) To calculate Ex, we take the partial derivative of V with respect to x: Ex = - ∂V/∂x = - (Q/(4πε0)) × (x/r³)

B) To calculate Ey, we take the partial derivative of V with respect to y: Ey = - ∂V/∂y = - (Q/(4πε0)) × (y/r³)

C) To calculate Ez, we take the partial derivative of V with respect to z: Ez = - ∂V/∂z = - (Q/(4πε0)) × (z/r³)

D) To show that the results of parts (a), (b), (c) agrees with the equation for the electric field of a point charge, we can use the equation for the electric field of a point charge E→ = (Q/(4πε0r²)r^. We can see that, Ex = -(Q/(4πε0))×(x/r²) , Ey = -(Q/(4πε0))×(y/r²), Ez = -(Q/(4πε0))×(z/r²) which is equivalent to the formula for the electric field of a point charge E → = (Q/(4πε0r²)) ^r. So, the results of parts (a), (b), (c) agrees with the equation for the electric field of a point charge.

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The statement "The excitation of the mercury vapor glows the phosphorus coating inside the lamp of a fluorescent lighting." is true.

In a fluorescent lamp, the electric current excites the mercury inside the lamp which is in vapor form. This process generates the ultraviolet light wave of very short wavelength, which causes the glow of phosphorus coating inside the lamp. Thus a fluorescent lamp converts the very little electrical energy into useful and sufficient light energy.

--The given question is incomplete, the complete question is "Which of the following statement is true about fluorescent lighting? a) Phosphorus coating inside the lamp of a fluorescent lighting glows by the excitation of the mercury vapor. b) The efficiency of fluorescent lighting is much low."

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The distances are mentioned below.

What is distance?

Distance refers to the measure of the separation between two points in space. The distance between two points can be determined using mathematical formulas, such as the distance formula in Euclidean space or the great-circle distance formula in a curved space. Distance can also be thought of as a scalar quantity, meaning it has only a magnitude and no direction.

Part A:

To find the closest distance that the coin can be held and still be in focus, we can use the lens equation 1/f = 1/d_o + 1/d_i where f is the focal length of the lens, d_o is the object distance, and d_i is the image distance.

We know that f = 11 D and d_i = 1.7 cm

Therefore,

1/f = 1/d_o + 1/d_i

1/11D = 1/d_o + 1/(1.7cm)

Solving for d_o,

d_o = 1/(1/11D - 1/(1.7cm))

The closest possible distance that Anna can hold the coin to have it appear in focus is d_o. The unit will be in cm.

Part B:

The size of the image that the lens forms on the retina is determined by the lens equation:

1/f = 1/d_o - 1/d_i

where f is the focal length of the lens, d_o is the distance from the lens to the object, and d_i is the distance from the lens to the image.

We know that f = 11 D and d_o = closest possible distance found in Part A.

Therefore,

1/d_i = 1/f - 1/d_o

Solving for d_i, the distance from the lens to the image, will give us the size of the image of the coin on Anna's retina. The unit will be in cm.

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The potential energy of the 93 kg person standing 4.2 meters off the ground is 3733.6 Joules.

Potential energy is the power that an object can store due to its position in relation to other objects, internal stresses, electric charge, or other circumstances.

To calculate the potential energy of a 93 kg person standing on a bridge 4.2 meters off the ground, we can use the formula for gravitational potential energy:

PE = mgh

Where PE is potential energy, m is the mass of the person, g is the acceleration due to gravity, and h is the height above the ground.

The acceleration due to gravity is approximately 9.8 m/s² on earth surface.

So, the potential energy of the person is:

PE = (93 kg) * (9.8 m/s²) * (4.2 m)

PE = 3733.6 J.

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The circuit operators between the final overcurrent device guarding the circuit and the outlet(s) neat defines a branch circuit.

In physics and electrical engineering, a conductor is an object or type of material that allows the inflow of charge (electric current) in one or further directions. Materials made of metal are common electrical operators. Electric current is generated by the inflow of negatively charged electrons, positively charged holes, and positive or negative ions in some cases.

A branch circuit is an electrical circuit that starts at a main service panel or load center and extends to one or more electrical outlets, devices, or appliances. The final overcurrent device, such as a circuit breaker or fuse, is used to protect the circuit from excessive current and to disconnect the power in case of an overload or short circuit. The conductors that run between this device and the outlet(s) are referred to as branch circuit conductors.

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In the above case, It is not possible for it to rain cats and dogs as it is a figure of speech and not a literal occurrence. Similarly, humans cannot turn into a different species as it goes against the laws of science .

What is the species about?

The statement above is not entirely accurate. Raining cats and dogs is a phrase used to describe heavy rain, it is not a real phenomenon. And humans cannot turn into a different species, it is a biological impossibility.

What does it imply when it says it's raining cats and dogs?

Consequently, a storm with strong winds (cats) and heavy rain may be described as "raining cats and dogs" (cats). Greek word cata doxa, which means "contrary to experience or conviction," may have been the source of the phrase "cats and dogs." It is raining exceptionally or ridiculously hard if it is raining cats and dogs.

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She discovers she is going to be in balance when the middle of the board reaches 0.50 m to a outside of a fulcrum and she is m towards the left of something like the fulcrum.

The answer to the questions and What does fulcrum  is straightforward: A lever's fulcrum is its fixed point. A seesaw, for instance, is a lever with a pivot in the centre. The fulcrum of a swing set is the stationary central component.

A lever's pivot point is known as the fulcrum. The lever is supported by the fulcrum. A feedback loop is an illustration of a lever The fulcrum of a seesaw is the bar it sits on. The pivot of the beam is thought to be the fulcrum. When effort is exerted to one side of the lever, a load is added to the other end.

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Answer: A, C, E

Explanation:

Potassium and sodium both belong to Group 1. They have the same number of valence electrons. Therefore, they form similar compounds with other elements.

Now, the binding energy per nucleon, DeltaE / 32 nucleons for S = 4.36 x 10-11 J / 32

Now, calculating the theoretical mass of 32S,

32S contains 16 protons and 16 neutrons,

Also, we know,

Mass of proton = 1.00728 amu

Mass of neutron =1.00866 amu

1 amu = 1.66 x 10-27 Kg

Thus,

Mass of protons = 16 x 1.00728 amu = 16.1165 amu

Mass of neutrons = 16 x 1.00866 amu = 16.1386 amu

The theoretical mass of 32S = 16.1165 amu + 16.1386 amu = 32.2550 amu

Now, the mass difference (\Deltam) = Theoretical mass - Actual mass

Deltam = 32.2550 amu - 31.9633 amu

Delta m = 0.2917 amu

Converting amu to Kg,

= 0.2917 amu x (1.66 x 10-27 Kg / 1 amu)

Deltam = 4.8443 x 10-28 Kg

Now, we know the formula,

DeltaE = \Deltam x c2

Here, c = 3.00 x 108 m/s

Substituting the known values,

DeltaE = 4.8443 x 10-28 Kg x (3.00 x 108 m/s)2

DeltaE = 4.36 x 10-11 J

The least amount of energy necessary to separate or break down an atom's nucleus into the subatomic particles that make it up is known as nuclear binding energy (which are protons and neutrons).

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Change in the momentum of the object with mass 4.9 kg on which force of 6.36 N acts for 20.4 s is 31.164kgm/s and change in velocity is 6.36m/s

As we know Force acting on any object is

F = m.a...........(1)

where m ⇒ mass

and a ⇒ acceleration

Also [tex]a=\frac{v}{t}[/tex]..........(2)

where v ⇒ velocity

t ⇒ time

so equation (1) can be written as:

[tex]F=\frac{m.v}{t}[/tex]..........(3)

Change in Momentum is equal to

p=m.v.......(4)

where m ⇒ mass

v ⇒ velocity

Now as per the question:

Force, F = 6.36 N

Mass, m = 4.9 kg

Time, t = 20.4s

putting the values in equation (3),

we get [tex]6.36=\frac{4.9*v}{20.4}[/tex]

by solving this we get a value of v=6.36m/s

putting the values in equation (4)

we get, Change in momentum

[tex]p=4.9*6.36\\p=31.164kg m/s[/tex]

so the change in velocity is 6.36m/s and change in momentum is 31.164kgm/s

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We know that the work-energy theorem states that the change in energy (in this case, kinetic energy) is equal to the work done on a system.

what is energy ?

Energy is the capacity to do work. It exists in many forms, such as kinetic, potential, thermal, electrical, chemical, nuclear, and mechanical energy. Kinetic energy is energy that is in motion, such as a moving car or the wind. Potential energy is energy that is stored, such as the energy stored in a stretched rubber band or a raised weight.

Thermal energy is the energy of moving molecules, such as the energy in hot water or in the air. Electrical energy is energy associated with the movement of electrons. Chemical energy is the energy stored in the bonds of atoms and molecules. Nuclear energy is energy stored in the nucleus of an atom. Mechanical energy is energy associated with the motion and position of an object.

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A tilted surface is referred to as an inclined plane in physics. A known imbalanced force causes objects to accelerate down inclined planes.

If there is no net force acting on an object, it will slide down an inclined plane at a constant speed. Translational kinetic energy, which is equal to half the object's mass times the square of its velocity, is a form of kinetic energy that slides have. Rotational kinetic energy is a special kind of kinetic energy that is present in rotating objects like spinning tops. An object in motion has kinetic energy in both directions, translation and rotation. Since the steel sphere is circular and moves more quickly than a block, it reaches the bottom first.

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Answer:

20

Explanation

f=Kgm/s
2multiply by 10=20

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The weight of the block on the horizontal surface will be 20N.

It is given that the force applied on the block is being pushed by applying a force of 20N, also the force is in such a manner that the block is moving with constant speed.

Now, we know, the weight of the body is equal to the product of the acceleration due to gravity and the mass of the body.

Now, we know,

W = Mg

Where,

M is mass and g is gravitational acceleration.

Putting values,

W = 2 x 10

W = 20N.

So, the weight of the block is 20N.

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Answer:

Explanation: The expression would be

M1V1 = M2V2

According to the question ,On writing 0.51 in scientific notation , the value of a is 5.1 and value of k is -1 .

When a number outside 1 and 10 is scaled by a power of 10, the result is represented in scientific notation.

Simply put, scientific notation is a means to write numbers. Due to its lower length, increased efficiency, and straightforward magnitude indication, it is particularly helpful when expressing extremely big or extremely small quantities. A decimal portion multiplied by an integer number of ten can be used to represent any real number.

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The energy produced by the heart in a day when the power output of the heart is given is calculated to be 1.15 × 10⁵ J.

Given that,

Power output of human heart = 1.33 W

Time in one day = 24 hours = 24×60 min = 24×60×60 s = 86400 s

Energy produced by heart in a day = ?

The expression for energy, power and time is given as, E = P t

where, P is power

t is time

E is energy

The energy it produces is equal to the power output times the time the heart does work.

E = P t = 1.33 × 86400 = 1.14912 × 10⁵ J ≈ 1.15 × 10⁵ J

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A is the correct answer. The arrow pointing up in A represents the force of gravity (mg).

Force is an external influence that can change the motion, direction, shape, and/or energy of a physical object. It can be a push, a pull, or a twist, and it can act on an object at a distance. Force is a vector quantity, meaning that it has both magnitude and direction.

The arrow pointing to the right represents the normal force (N), which is the force that the surface exerts on the block in order to keep it from sinking into the surface due to gravity. The arrow pointing down in A represents the frictional force (f), which is the force that the surface exerts on the block in order to prevent it from sliding along the surface.

1)

T > mg

The force due to tension acts upwards on the box and the force due to gravity acts downwards on the box. As the box is accelerated upwards then the T should be greater than the weight of the box.

ma = T - mg

mg = T- ma

Therefore, T> mg

2)

The option A, best describes the free body diagram.

3) In option A, the normal force is equal to the weight of the block which is kept at rest. N = mg

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The total energy will be 125,000 J. The total energy is sum of kinetic energy and potential energy.

We use the (joking) example of trying to roast a turkey using potential energy to help us develop an intuitive understanding of the relative magnitudes of the various kinds of energy.

A 100 m building (about 30 floors) is used, and the turkey is carried to the top before being thrown from the edge. Thus, the potential energy is transformed into kinetic energy, which is then transformed into internal energy upon collision.

A rise in temperature is a representation of an increase in internal energy, and if this experiment is carried out frequently enough, the turkey should be able to cook as a result.

Therefore, The total energy will be 125,000 J. The total energy is sum of kinetic energy and potential energy.

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The linear speed will be 24π

To find the linear speed in (km/hr) Use conversion as follows

1 km = 100000 cm

1 hr = 60 min

radius of a disc(r) = a point from a center of a disc = 5 cm

= 5/100000

=0.00005km

=5 × 10⁻⁵

Angular speed of the drive can be found as

ω= 2πr / T

where v is the angular speed and T is the time for 1 revolution.

T= 1/n ; where n is the revolution per min.

Substitute the given values we have;

ω =4000×2π × 5 × 10⁻⁵

Simplify:

ω= 4 × 10⁻¹ π km\min

1 hour = 60 minutes.

then;

ω = 60 ×4  × 10⁻¹ π

ω = 24 × 10⁻¹

ω = 24π km\min

therefore, the linear speed in km/hr is, 24π

Your uestion is incomplete most probably your full question was

A drive has a maximum speed of 10.000 revolutions per minute. if a disc has a diameter of 14 cm, what is the linear speed, in km/h of a point 5 cm from the center of the disc is spinning at a rate of 4000 revolutions per minute

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( 1) The net gravitational force between the 74.8 kg mass is  8.09 x 10⁻⁵ N.

( 2) The distance from the from the 494 kg mass where the middle mass experiences net zero force is 0.258 m.

The net gravitational force acting on the middle mass is calculated by applying Newton's law of universal gravitation as shown below.

F = ( GmM ) / ( R² )

where;

The force between the first mass and the middle mass is calculated as;

F' = ( 6.672 x 10⁻¹¹ x 141 x 74.8 ) / ( 0.198² )

F' = 1.8 x 10⁻⁵ N

The force between the third mass and the middle mass is calculated as;

F'' = ( 6.672 x 10⁻¹¹ x 494 x 74.8 ) / ( 0.198² )

F'' = 6.29 x 10⁻⁵ N

The net gravitational force on the middle mass;

F (net)  = 6.29 x 10⁻⁵ N + 1.8 x 10⁻⁵ N

F ( net ) = 8.09 x 10⁻⁵ N

Let the distance of zero net force from the 141 kg mass = d.

then the distance from the 494 kg mass = 0.396 m - d

F' = ( 6.672 x 10⁻¹¹ x 141 x 74.8 ) / ( d² )

F' = 0.704 x 10⁻⁶ / d²

F'' = ( 6.672 x 10⁻¹¹ x 494 x 74.8 ) / ( 0.396 - d )²

F'' = 2.47 x 10⁻⁶ / ( 0.396 - d )²

for zero net force, the two forces must be equal

0.704 x 10⁻⁶ / d²  = 2.47 x 10⁻⁶ / ( 0.396 - d )²

0.704 (0.396 - d )² = 2.47d²

(0.396 - d )²  = ( 2.47d² ) / ( 0.704 )

(0.396 - d )²  = 3.51d²

0.396 - d = √ ( 3.51d² )

0.396 - d = 1.87d

1.87d + d = 0.396

d (1.87 + 1) = 0.396

d (2.87) = 0.396

d = 0.396 / 2.87

d = 0.138 m

The distance from the 494 kg mass = 0.396 - 0.138 m = 0.258 m

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signifies a development or size increase caused by a slow process of external addition and accumulation. The term "accretion" refers to the process in astrophysics and planet physics whereby a celestial object gains mass through the gravitational accumulation of smaller celestial objects and surrounding gas.

The steady growth in size of an item caused by the accumulation of materials due to gravity is known as accretion. In those other words, as tiny amounts of matter are drawn to an object by gravity and adhere to it, the object will become larger and larger.

Gravitational forces acting on material of all sizes and compositions, including gas, dust, plasma, and even dark matter, inevitably lead to accretion. Matter accretes because of gravity. Additionally, as matter gathers, it creates objects.

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It takes 1.28s for the light to travel from the moon to earth.

What is light Year?

In a vacuum, light moves at a speed of 186,000 miles or 300,000 kilometres per second. Light can circle the Earth seven times in a single second to give you a quick idea of how fast this is! The speed of light is used by astronomers to calculate how far away in space an object is. Light-years are units used to describe the distance that light can cover in a year (ly).

A light-year is a measurement of length.

It is the distance that a light photon covers in a single Julian year in the vacuum.

by the letter ly

One light year has a fixed value.

The speed of light (c) is constant everywhere, it is

299,792,458m/s=299,792.458km/s

Therefore, it takes 1.28s for the light to travel from the moon to earth.

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Energy-interaction diagrams, also known as energy level diagrams, are graphical representations of the possible energy states of a system and the transitions between them. They are used to describe the behaviour of a system in terms of its energy levels and the interactions that cause transitions between them.

There are two types of interaction diagrams- a sequence diagram and the other is a collaboration diagram.

There are stages of relational interaction in which relationships come together (initiating, experimenting, intensifying, integrating, and bonding) and come apart (differentiating, circumscribing, stagnating, avoiding, and terminating).

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