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UNO [17]
3 years ago
15

Explain velocity ratio. Explain and define the efficiency of a machine​

Physics
1 answer:
Norma-Jean [14]3 years ago
8 0
Velocity ratio is also defined as the ratio of a distance through which any part of a machine moves, to that which the driving part moves during the same time. An object has a mechanical advantage if it exerts a force higher than the velocity ratio.
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Si un cuerpo adquiere una carga de -0,02 C, ha ganado o ha perdido electrones? Cuantos?
sammy [17]

Question :

If a body acquires a charge of -0.02 C, has it gained or lost electrons? Many?

Solution :

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Now, number of electrons is given by :

n = \dfrac{net\ charge}{charge \  on \ one \  electron}\\\\n = \dfrac{-0.02}{-1.60 \times 10^{-19}}\\\\n = 1.25\times 10^{17}

Hence, this is the required solution.

7 0
3 years ago
Please help with this!!!!!
34kurt
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One end of spring is attached to a wall. The other end is attached to a movable block. If you pull the block so as to stretch th
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Answer: Positive

Explanation:

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