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Alexxandr [17]
3 years ago
10

For work to be accomplished we must have

Physics
2 answers:
Nat2105 [25]3 years ago
8 0
The answer they are looking for is the last one. However the last two are technically correct but the third one would result in negative work.
Sunny_sXe [5.5K]3 years ago
8 0

Answer:

a force and a movement in the same direction as the force.

Explanation:

As we know that the formula to find the work done is given by

W = \vec F. \vec d

here if the force is applied at some angle with displacement then in that case

W = F d cos\theta

now we know that if the force and displacement is in opposite direction then the work done is negative while if the force and displacement is in same direction then the work done is positive

So work to be accomplished only when the sign of the work done is positive so it must be in the same direction as that of displacement of the object

so correct answer would be

a force and a movement in the same direction as the force.

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The nuclear fusion of hydrogen atoms releases a huge amount of energy. So the correct choice is C. Conversion of mass to energy.

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When two small nuclei join to form a new nucleus, then this process is termed nuclear fusion. A huge amount of energy is released when there occurs nuclear fusion between the two nuclei. And a new element is formed.

It has been observed that the amount of energy released in nuclear fusion is equal to the mass difference between the mass of the formed nucleus and the total mass of old nuclei. Hence in the nuclear fusion of hydrogen nuclei to form a helium nucleus, the energy is released due to the conversion of mass into energy.

The pressure is increased to make the hydrogen atoms fuse but this change in pressure does not contribute to the energy released in the fusion of hydrogen.

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