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Gennadij [26K]
3 years ago
8

3. A moving car covers a distance of 100 km in two hours. What is meant by this?

Physics
1 answer:
GenaCL600 [577]3 years ago
8 0

Answer:

50km /hour

Explanation:

The car moves 100km in two hours.

We can write a ratio like this:

100km : 2hr

Divide both sides by two and you get:

50km : 1hr

Meaning the moving car is moving 50km an hour.

Hope this helps :)

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Answer:

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Explanation:

First, let's find the voltage through the resistor using ohm's law:

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AC power as function of time can be calculated as:

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Where:

\phi=Phase\hspace{3}angle\\\omega= Angular\hspace{3}frequency

Because of the problem doesn't give us additional information, let's assume:

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Evaluating the equation (1) in t=3600 (Because 1h equal to 3600s):

P(3600)=160*8*cos(0)-160*8*cos(2*120\pi*3600-0)\\P(3600)=1280-1280*cos(2714336.053)\\P(3600)=1280-1280*0.5365255751\\P(3600)=1280-686.7527361=593.2472639\approx=593.247W

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