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ArbitrLikvidat [17]
3 years ago
15

Why is random sampling and random assignment in experimental research important?

Physics
1 answer:
Hunter-Best [27]3 years ago
6 0

So the result is not biased or affected in some way

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Pump A can fill a tank of water in 5 hours. Pump B can fill the same tank in 8 hours. How long does it take the two pumps workin
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Answer:

It will take both pumps 3.08 hours to fill the tank working together.

Explanation:

Pump A can fill the tank in 5 hours. Assuming that the pump gives out a steady flow of water, in one hour, pump A can fill 1/5th of the tank. Similarly, pump B in an hour, fills up 1/8th of the tank.

We must add up these two values, in order to find how much of the tank the two pumps can fill up together in one hour.

1/5 +1/8 =13/40

So 13/40 of the tank is filled in an hour. We need to find how many hours it will take for the entire tank to be filled. To do so, divide 40 by 13. This gives:

3.08 hours to fill up the tank.

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\gamma  \: dynamo \: converts \: the \: mechanical \: energy \: into \: electrical \: energy \: .

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Explain Alfred wegener's hypothesis
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