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kvasek [131]
3 years ago
7

An example of friction being converted into heat energy is A) the sun. B) a generator. C) a Snickers bar. D) rubbing your hands

together.
Physics
2 answers:
padilas [110]3 years ago
7 0
D.) Rubbing your hands together

Hope this helps! ( brainleist??)

Viefleur [7K]3 years ago
3 0

Explanation :

Friction is a force which resists the relative motion of an object. It always act in opposite direction.

When two surfaces are in contact and moving with respect to each other, then the frictional force act in between them. Due to this force the kinetic energy converts into thermal energy.

For example, on rubbing our two hands together we feel warm. This is due to a force called friction.

So, (D) is correct answer.

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An object at rest will stay at rest and an object in motion will stay in motion unless it is acted upon by an unbalanced/external force.

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Points a and b lie in a region where the y-component of the electric field is Ey=α+β/y2. The constants in this expression have t
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Answer:

V_{a} - V_{b} = 89.3

Explanation:

The electric potential is defined by

         V_{b} - V_{a} = - ∫ E .ds

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         V_{b} - V_{a} = - ∫ E ds

We substitute

         V_{b} - V_{a} = - ∫ (α + β/ y²) dy

We integrate

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We evaluate between the lower limit A  2 cm = 0.02 m and the upper limit B 3 cm = 0.03 m

           V_{b} - V_{a} = - α (0.03 - 0.02) + β (1 / 0.03 - 1 / 0.02)

            V_{b} - V_{a} = - 600 0.01 + 5 (-16.67) = -6 - 83.33

            V_{b} - V_{a} = - 89.3 V

As they ask us the reverse case

             V_{b} - V_{a} = - V_{b} - V_{a}

             V_{a} - V_{b} = 89.3

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