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coldgirl [10]
3 years ago
11

2. A car has a mass of 1700 kg and is moving at a speed of 25 m/s. Find its momentum.

Physics
1 answer:
Whitepunk [10]3 years ago
5 0

Answer:

42500 kg.m/s

Explanation:

Momentum = mass * velocity

Momentum = 1700* 25

Momentum = 42500 kg.m/s

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It takes 20s for 3x10^6 electrons to flow through a wire ,what is the current?
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Answer:

Explanation:

The variables we know and are given are:

time, t = 20s

Charge, Q = 3x1-^-6 electrons, which is just 3x10^-6C (C stands for Coulombs, which is the unit for Charge)

We need to find the current, I, and since we know Q and t we can substitute these values into the given equation:

I=Q/t (which if you look at what the RHS is saying, its Charge over time, or more literally means the amount of charge passing a point over a period of time)

If we substitute these values, we will get I as:

I = Q / t

I = 3x10^-6 / 20

I = 1.5x10^-7 A

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