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enot [183]
3 years ago
14

The electric motor has an input energy of 50,000 joules each second. The motor transfers 35,000 joules of useful energy each sec

ond. Calculate the efficiency of the electric motor (show workig out too)
Physics
1 answer:
Sergio039 [100]3 years ago
6 0
W(out)/w(in)
35,000J/50,00J=.7
.7 *100%=70 % efficient
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I think the answer is 60 cm.
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Please answer all of them <br>I'll give brainly if answer for points will be reported ​
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Answer:

Level 1-

1. It depends of the sense and the magnitude of the force

2. Electric force

3. A contact force need to touch to act in the object, like push a box for example. A non-contact force don't need to touch to act in the object, like an magnet attracting other magnet

4. The pressure is the force divided by the area. The unit for pressure in the international system is Pascal

5. Because the pressure is applied in all the surface of our bodies, so the force is divided by the surface area of our bodies.

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1. The balloons stick to the walls because when she rubbed they in her clothes they earned eletric charge, and when they touched the wall, the electric charges of the wall got polarized and it creats a attraction force.

The same happened with the water stream. The balloons were charged with electric charges and the water was attracted by it.

2. Mass is the amount of matter, it's an scalar quantity. Weight is the force created by the attraction of a massive body as the Earth, and another body as a human, and a force is a vector

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pressure of the man: 100/25 = 4

pressure of the elephant: 4500/250 = 18

So, the girl exerts more pressure.

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