2 years ago

Which device provides electrical energy to run an electric circuit

Physics

1 answer:

DanielleElmas [232]2 years ago

3 0

The battery provides electrical energy to run an electric circuit.

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well sound waves interact with our ears and light interacts with our vision

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A 12.0-g bullet is fi red horizontally into a 100-g wooden block initially at rest on a horizontal surface. After impact, the bl

allochka39001 [22]

Answer:

$v_1 = 91.3 m/s$

Explanation:

By energy conservation and work energy theorem we can say that after bullet hits the block, it will move on the rough floor and comes to rest

so here work done by frictional force = change in kinetic energy

so we know that

$W_f = \frac{1}{2}mv_f^2 - \frac{1}{2}mv_i^2$

$-\mu mg d = \frac{1}{2}m(v_f^2 - v_i^2)$

$-0.650(9.81)(7.5) = \frac{1}{2}(0 - v_i^2)$

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$v = 9.78 m/s$

now by momentum conservation we have

$m_1 v_1 = (m_1 + m_2) v$

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$v_1 = 91.3 m/s$

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2 years ago

Heather drops a ball weighing 0.50kg a distance of 2.0m. If the speed of the ball right after it bounces is the same speed of th

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The speed of the ball just before impact was v=√(2gh) = 6.26m/s. The acceleration is twice this over the time (twice because the second speed is the same in the other direction, meaning the total change in speed is 2V)
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The force is F=ma, so F = 0.5kg·125.2m/s² = 62.6N

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3 years ago

11. What causes potential energy that accumulates in a fault to transfer to the surface during an

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Answer: your answer is B

Explanation: Seismic waves causes potential energy that accumulates in a fault to transfer to the surface during an earthquake.

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which of the following drives the movement of convection currents A. pressure differences B. density differences C. volume diffe

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Convection currents are driven by the buoyancy
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