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2 years ago

8

You use a rope 2.00 m long to swing a 10 kg weight around your head. The tension in the rope is 20 N. In half a revolution how m

uch work in J is done by the rope on the weight

1 answer:

satela [25.4K]2 years ago

8 0

Answer:

No work is done on the weight. :3

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How does energy change (transforms) as the mass is dropping?

olganol [36]

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Mass has total mechanical energy, which is the sum of kinetic and potential energy. as the mass is dropping, potential energy is converted into kinetic energy so mechanical energy is preserved If there is no friction. If there is friction, some of the mechanical energy is lost as heat energy so it changes.

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Forces affect motions in living and nonliving things. In a human, swallowed food moves down the esophagus into the stomach, even

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2 years ago

If 1495 j of heat is needed to raise the temperature of a 351 g sample of a metal from 55.0°c to 66.0°c, what is the specific he

forsale [732]

The amount of heat needed to increase the temperature of a substance by $\Delta T$ is given by
$Q= mC_s \Delta T$
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If we re-arrange the formula, we get
$C_s = \frac{Q}{m \Delta T}$
And if we plug the data of the problem into the equation, we can find the specific heat capacity of the substance:
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3 years ago

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A substance freezes at -58c therefore substance melts at ?

Yanka [14]

The freezing point is the same as the melting point.

If it freezes at -58°C, hence the melting point is also <span>-58°C.</span>

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2 years ago

Is Environmental Nature or Nurture?

erma4kov [3.2K]

ANSWER: NATURE

EXPLAINTION:

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