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3 years ago

Which describes nuclear fusion?

Physics

2 answers:

marta [7]3 years ago

7 0

The first one, when two nuclei combine.

Usimov [2.4K]3 years ago

4 0

Answer:

The correct choice is

The nuclei of two atoms combine to form a larger nucleus.

Explanation:

Nuclear fusion is defined as the process in which the nucleus of two smaller atoms combine together to form a larger nucleus and in the process of combining the two smaller nuclei, large amount of energy is released. An example of such a process is fusion reaction taking place inside sun and stars.

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Two long, straight wires, one above the other, are separated by a distance 2a and are parallel to the x-axis. Let the be in the

ivolga24 [154]

Answer:

field B = µ₀c I / 2πr

The field in the xy plane due to the fact that the two wires are perpendicular to the plane Bx and By are everywhere 0 on the plane.

a) Midway between, the Bz components cancel, so <0, 0, 0> T

b) Bz = µ₀ x I / 2πa + µ₀ x I / 2π(3a) = (µ₀ x I / 2π)(1/a + 1/3a)

Bz = (µ₀ x I / 2πr)(3/3a + 1/3a) = (µ₀x I / 2πr)(4 / 3a) = 2µ₀ x I / 3πa

c) By symmetry, Bz = -2µ₀ x I / 3πa (that is, down into the plane)

8 0

3 years ago

Please Help Me I will try and give extra points if I can and if you have the rest of the answers to this then please help me out

stepan [7]

First, you must know that the statement "<span>An object at rest tends to stay at rest. An object in motion tends to stay in motion unless acted upon by an outside force." is true, because it is the first Law of Newton or inercy law.

what outside force acts on a baseball when it is thrown straight like a pitcher pitching a ball?

After the ball leaves the pitcher's hand, it is subject only to the gravitational attraction of the Earth. That is why the pitcher has to give the appropiate impulse in order to the ball reaches the point that he and the catcher want.

What about if you threw it straight into the air?

It is the same thing. The only force would be the gravitational attraction of the Earth.

What about if you threw the baseball in outer space. Would there be any forces to slow that down?

In outer space, at the beginning the baseball would be very far from of other massive objects to feel their gravitational field, so there would not be any forces to slow it down. Although eventulally, after many light-years, it would enter the gravitational field of a galaxy or other massive body and it would attract it.
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7 0

3 years ago

What is the net force acting upon this object? *

AnnZ [28]

2 N Right

.. .. .. .. .. .. .. ..

4 0

3 years ago

Read 2 more answers

Which device is often used to activate a circuit?

Romashka [77]

Answer:

A switch

Explanation:

Without switch the current cannot flow and hence, circuit cannot be activated.

8 0

4 years ago

Read 2 more answers

the gravitational potential energy of a ball is 20 J when the ball is dropped. If mechanical energy is conserved, which energies

Sergeeva-Olga [200]

Taking into account the definition of kinetic, potencial and mechanical energy, the potential and kinetic energy are possible for the ball as it falls.

<h3>Kinetic energy</h3>

Kinetic energy is a form of energy. It is defined as the energy associated with bodies that are in motion and this energy depends on the mass and speed of the body.

Kinetic energy is defined as the amount of work necessary to accelerate a body of a given mass and at rest, until it reaches a given speed.

<h3>Potential energy</h3>

On the other hand, potential energy is the energy that measures the ability of a system to perform work based on its position. In other words, this is the energy that a body has at a certain height above the ground.

Gravitational potential energy is the energy associated with the gravitational force. This will depend on the relative height of an object to some reference point, the mass, and the force of gravity.

<h3>Mechanical energy</h3>

Finally, mechanical energy is that which a body or a system obtains as a result of the speed of its movement or its specific position, and which is capable of producing mechanical work. Then:

Potential energy + kinetic energy = total mechanical energy

<h3>Principle of conservation of mechanical energy</h3>

The principle of conservation of mechanical energy indicates that the mechanical energy of a body remains constant when all the forces acting on it are conservative (a force is conservative when the work it does on a body depends only on the initial and final points and not the path taken to get from one to the other.)

Therefore, if the potential energy decreases, the kinetic energy will increase. In the same way, if the kinetics decreases, the potential energy will increase.

The gravitational potential energy of a ball is 20 J when the ball is dropped.

If principle of conservation of mechanical energy can be applied and the mechanical energy is conserved, the potential and kinetic energy are possible for the ball as it falls.

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2 years ago