How much energy is needed to perform 300 J of work?

Charging by Contact is positive. On object B, a positive charge will remain.

The fundamental physical property of matter, electric charge, exerts a force when kept in an electric or magnetic field. A magnetic field is produced by a moving electric charge, and an electric charge is associated with an electric field. Magnetic and electric fields combine to form the electromagnetic field. The interaction of the charges results in the electromagnetic force, which is the fundamental force in physics. Throughout this session, tell us about electric charges, their types, and their traits.

A scalar quantity is an electric charge. Only when a quantity complies with the laws of vector addition, such as the triangle law of vector addition and the parallelogram law of vector addition, can it be said to be a vector in addition to having a magnitude and direction. In the case of an electric current, the resultant current of these two currents at a junction is an algebraic sum rather than a vector sum. Therefore, despite having magnitude and direction, an electric current is a scalar quantity.

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Answer:

With an increase in temperature, the electrical conductivity of a pure metal decreases. This implies that the thermal conductivity of the pure metal shows little variance with an increase in temperature. However, a sharp decrease is observed when temperatures approach 0K

The maximum height the diving board can be above the water is 52.5m, so that she does not go any faster than 32 m/s when she enters the water.

To determine the maximum height the diving board can be above the water, we can use the equation of motion for a freely falling object:

v^2 = u^2 + 2as

where

v = final velocity (32 m/s)

u = initial velocity (0 m/s)

a = acceleration due to gravity (-9.8 m/s^2)

s = distance fallen (height of diving board above water)

We can rearrange the equation to find the distance fallen (s)

s = v^2/(-2a) - u^2/2a

substituting the values

s = 32^2/(-2*(-9.8)) = 32^2/19.6 = (1024/19.6) = 52.5 m

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he JM will heighten (exaggerate) lower limb tendon reflexes by countering some of the normal descending inhibition the brain sends to the reflex arc.

A medical technique called the Jendrassik manoeuvre involves the patient clenching their teeth, flexing both sets of fingers into a hook-like shape, and interlocking those sets of fingers. The patellar reflex is then induced by striking the tendon below the patient's knee with a reflex hammer.

When the technique is not being used, the reflex outcome of the same movement is compared to the induced reaction. When a patient is focused on the technique, a bigger reflex reaction is frequently seen: "Afferent activity brought on by such muscle tension may activate a weak or seemingly absent reflex.

This is the actual justification for the procedure, not that it is intended to divert the patient's attention, a common misperception that persists to this day." This result

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Answer:

B1 = μ_o•I1/2πr

Explanation:

According to the right hand rule, we can say that the magnetic field at the second wire due to the current being carried in first wire is given by;

B1 = μ_o•I1/2πr

Where;

r is distance that separates the two wires

μ_o is a constant known as permeability of free space

I1 is current in wire 1

The velocity of the particle at t=0 is zero because the particle is in rest position and did not moving at any of the instance or travelling at an uniform speed through out the whole journey or yet did not start from the source point.

Velocity is the rate of change of velocity. At any point on a trajectory, the magnitude of the velocity is given by the rate of change of velocity in both magnitude and direction. Velocity of the body that we can consider is the increasing value of the velocity of any object at a constant rate and that of we can calculate. Hence by the primary information that we have we can formerly consider that the velocity which is acting on the particle at t=0 is zero because the particle is in rest position and did not moving at any of the instance or travelling at an uniform speed through out the whole journey or yet did not start from the source point.

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Answer: yeah for sure but post the picture

Explanation:

Lol

Salt dissolves in water to form saltwater. This kind of change is regarded as a chemical change.

A physical change is a kind of change in which only the physical properties of matter change. In a physical change, neither the composition nor the chemical nature of matter is changed.

A chemical change involves a chemical process that results in the production of new substances. When you dissolve salt in water the sodium chloride dissociates in Na+ and Cl- ions which can be written in the form of a chemical reaction as,

NaCl →  Na+(aq) + Cl-(aq)

Thus, dissolving salt in water is an example of a chemical change.

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Answer:

Efficiency = 20%

Explanation:

Given the following data;

Input energy = 1000 Joules

Output energy = 200 Joules

To find the efficiency of the solar cell;

[tex] Efficiency = \frac {Out-put \; energy}{In-put \; energy} * 100 [/tex]

Substituting into the formula, we have;

[tex] Efficiency = \frac {200}{1000} * 100 [/tex]

[tex] Efficiency = 0.2 * 100 [/tex]

Efficiency = 20%

Answer:

El castigo de Juan fue justo y a la vez injusto.

Explanation:

Adjetivos opuestos: justo - injusto

La oración significa que el que castigo era merecido, sin embargo, puede ser algo exagerado por lo tanto algo injusto. Describiendo la situación con adjetivos con significado opuesto al mismo tiempo, mediante un conector de simultaneidad que es y a la vez.

Answer:

378 N

Explanation:

F = ma = (63 kg)(6 m/s²) = 378 N

A skier weighing 63 kg needs 189N of force to accelerate at 6 m/s. The magnitude of the force required to accelerate the sled is 91 newtons.

An object's acceleration is equal to the net force acting on it divided by its mass, or a = F m, according to Newton's second law of motion. When the object's mass and the net force it is subjected to are known, this acceleration equation can be used to determine its acceleration.

By the second law of Newton, F = ma Add the following numbers:

F=189N F=63kg(2ms 2)

Formula for acceleration: there are three equations for acceleration:

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According to the given statement The coefficient of static friction was found to be about 0.0850.

Static friction is a force that prevents an item from moving. The friction encountered when persons attempt to move a stationary object on a surface without actually causing any relative motion between the body and the surface on which it is located.

The graph below depicts the turntable's constant maximum speed and the centripetal acceleration of the coin.

(a) The centripetal acceleration is caused by static friction.

(b) Using the diagram below,

mai^=fi^+nj^+mg(−j^)

Fy=0nmg, thus n=mg, and Fr=mrv2=f=n=mg

Then, \sμ=rgv²=(30.0cm)(980cm/s2)(50.0cm/s)²

=0.0850

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The complete question is -

A coin placed 30.0cm from the center of a rotating, horizontal turntable slips when its speed is 50.0cm/s. (a) What force causes the centripetal acceleration when the coin is stationary relative to the turntable? (b) What is the coefficient of static friction between coin and turntable?

According to the given information the correct order is Charon ,Europa, Rings around Saturn.

A straight line that cuts through the middle of a figure and body is called a diagonal. Particularly: the width of a diameter; a line segment passing thru the center of the circle with its endpoints on the circumference.

A circle's diameter is measured as the width of a line connecting its two center points. Since diameter only applies to circular or circularly based objects, such as a sphere or cylinders, the length and width must always be equal.

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Answer:

the order goes

G

E

C

A

Explanation:

Hope this helps.

Answer:

Series.

Explanation:

Current is the same in each device since there is only a single pathway for the charge to flow.

Answer:

The amount of work done is 45 J.

Explanation:

We know that the force applied is 15N. The amount of displacement experienced by the box is 3 metres along the floor.

Thus, F= 15N

D= 3 metres

The formula for calculating work done is W= F×D

Thus, W=15×3

W=45J

Thus, the amount of work done is 45J.

The objects must be of opposite charge because the electric force of attraction between them increases when they are released and free to move.

This means that the electric force must be a repulsive force that pushes the objects away from each other. Opposite charges attract and as charges repel, the objects must be of opposite charge for the electric force to increase when the objects are released and free to move.

Therefore when two small objects carry the same amount of charge, the magnitude of the electric force exerted by one object on the other is 0.10 N when they are held 30 mm apart. If the force magnitude increases when the objects are released and free to move, then we can say that they are opposite charges.

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Answer:

a hamster resulting from sexual reproduction

Torque =   force x distance from point of rotation

Torque is a measure of the turning effect of an applied force about a specific point or axis. It is calculated by multiplying the force applied to an object by the distance from the point of rotation to the point where the force is applied. The greater the force or the longer the distance from the point of rotation, the greater the torque. The unit of torque is typically Newton-meters (N·m) in the International System of Units (SI) or pound-feet (lb·ft) in the imperial system. Torque is essential in various fields such as physics, mechanics, engineering and robotics.

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Answer:

200 K

Explanation:

0 °C = 273 K

-73°C = 273 K - 73 K = 200 K

The variation with time of the kinetic energy E_k of the ball is that it decreases. This is because gravity is acting against the ball and slowing it down, so the kinetic energy is decreasing as the ball slows down.

When the ball is released, the initial kinetic energy, E_k, is given by the equation: E_k = mgh, where m is the mass of the ball, g is the gravitational acceleration, and h is the initial height of the ball. As the ball rises, its height increases, and the potential energy, U, increases. However, this increase in potential energy is at the expense of kinetic energy, so the kinetic energy decreases as the ball rises.  

When the ball reaches its maximum height, its kinetic energy is zero as it is at rest. As the ball then begins to fall, its potential energy decreases, and its kinetic energy increases. This is because the ball is falling under the action of gravity, and thus its kinetic energy increases as it accelerates downwards.  Overall, the kinetic energy of the ball decreases as it rises and increases as it falls.

This is due to the conservation of energy, which states that the total energy of a system remains constant. As the potential energy increases, the kinetic energy decreases, and vice versa.

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The set of spectral lines that we see in a star's spectrum depends on the star's (b) chemical composition, (d) temperature.

The spectral lines of a star are determined by its chemical composition and temperature. These properties determine the number and type of atoms present in the star's atmosphere. Each type of atom has its own unique set of spectral lines, and the temperature of the star determines the energy level of the atoms, which affects the wavelengths of the spectral lines emitted. The rotation rate and atomic structure of a star do not affect the set of spectral lines we see in its spectrum.

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Answer:

answers are located on the picture attached to this answer

Explanation:

The human ear canal is closed at one end. Thus, the fundamental frequency of the given ear canal is 3044.64Hz 3044.64 Hz .

Under air conduction (AC) excitation, the mean resonance frequency of the human middle ear is estimated to be between 0.8 and 1.2 kHz. The typical resonance frequency under bone conduction (BC) excitation, according to research, is higher, at 1.5–2 kHz.

It is a tube with an open end (the concha section) and a closed end (the tympanic membrane), which responds to a quarter-wave by behaving as a resonator. The resonance frequency is described by the equation F=v/4L, where "v" stands for the speed of sound and "L" for the length of the EAC.

The EAR formula should be used: EAR = (1+ i/n)n - 1. I = Stated interest rate, etc.

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The correct option is A, B, and C. A block resting on a slope is Weight, static friction, and Normal force.

Static friction is a force that continues an item at relaxation. Static friction definition can be written as: The friction skilled while individuals try to move a desk-bound object on a surface, without surely triggering any relative movement between the frame and the surface on which it's miles.

Static friction is a form of friction force that acts on a body when there's no relative motion between the object and the surface. So, it can act even if the frame is in motion however there should be no relative motion.

A pressure acting on an item is said to be a static force if it no longer exchanges the scale, function, or route of that precise object. The pressure implemented to a structure acts as a load to that precise structure, that is why static force is likewise called a static load.

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Complete Question:

A block is resting on a slope. (Figure 3) Which of the following forces act on the block?

Check all that apply.

A). Weight

B). Static friction

C). Normal force

D). Kinetic friction

E). Force of push

Answer: An atom that gains or loses an electron becomes an ion. If it gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion

Answer:

when an atom gains electrons, it gains a negative charge

Explanation:

hope I helped you

Answer:

the speed of the satellite is 12,880.53 km/h

Explanation:

Given;

radius of the circular orbit, r = 24,600 km

time taken to revolve around Earth, t = 12 hours

The circumference of the satellite is calculated as;

L = 2πr

L = 2π x 24,600 km

L = 49,200π km

L = 154,566.36 km

The speed of the satellite;

v = L/t

v = 154,566.36 / 12

v = 12,880.53 km/h

Therefore, the speed of the satellite is 12,880.53 km/h

Answer:

Every object in space exerts a gravitational pull on every other.

Explanation:

gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit. It can also cause life-destroying asteroids to crash into planets.

Answer:

Yes it would be a lunar eclipse here is an image that I found that might help but during a lunar eclipse when the moon is directly behind earth it will be a full moon

Explanation:

Divide the radius by the shear stress and the polar moment of inertia to find the shaft torque.

A device that measures shaft torque records the degree to which a shaft will twist in the presence of a specific amount of force. A shaft will twist less than one with a torque of 3 degrees than one with a torque of 5 degrees, and so on.

The rotating equivalent of force is torque. So an object will rotate with an angular acceleration in response to a net torque. A torque must be described about the rotational axis since every rotational motion has an axis of rotation. A torque is an applied force that rotates an object about its axis.

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The  assumption which is important in models of galaxy formation is  Some regions in the universe start out denser than others. Option (D) is correct.

Models of galaxy formation begin with the premise that the universe was initially mostly uniformly filled with hydrogen and helium gas, with some regions of this gas being slightly denser than others.

The nucleus, a central bulge, a disc, spiral arms, and a large halo are the four main structural divisions of this structure. Some of the elements combine with one and other. A small portion of the galaxy, the galactic core is located about 400 light-years from the Milky Way's centre. Massive gas clouds which collapse and rotate are the initial point for galaxies. Stars develop within them as they develop. The collision of entire galaxies can change their appearance. When we look far into space, we can observe galaxies in their infancy.

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