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Marina CMI [18]
2 years ago
9

A sprinter runs for 6.45 s at 7.44 m/s. How far does she get?

Physics
1 answer:
Gwar [14]2 years ago
8 0

Answer:

D is the answer

Explanation:

6.45×7.44= 47.98800

Which if we round of we get 48m

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When hydrogen is fused into helium, energy is released from Choose one: A. the increase in pressure. B. the decrease in the grav
Tatiana [17]

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

What is nuclear fusion?

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.

The magnitude of the gravitational field is too low and it does not contribute to the energy released in the fusion of hydrogen.

The gravitational collapse does not occur between the two hydrogen atoms. This phenomenon occurs in celestial bodies so this also does not contribute to the energy released in the fusion of hydrogen.

Learn more about nuclear fusion here:

brainly.com/question/10165218

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8 0
1 year ago
Some machines do not multiply the force that is applied to them
Katyanochek1 [597]

Answer:

Machine Efficiency

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Your mom is making lunch which forces are acting on your mom
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The forces acting on your mom while cooking is Air resistance and the force of friction

<u>Explanation:</u>

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<u>2. The force of friction:</u>

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