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nikdorinn [45]
3 years ago
7

If the entire population of the united states forms a human chain by holding hands, how many times can such a chain be wrapped a

round the earth's equator
Biology
1 answer:
IceJOKER [234]3 years ago
7 0
The formula used can be found in Quora.com (population*average height)/Earth's circumference), gives the result of the number of the human chain.

If the average height of an American is 1.77m and the US population is  326, 292, 068 (June 2, 2017) and if everyone is already an adult. 

US population 326, 292, 068
Average height according to study
is estimated as the same as arm span  <span>1.77
</span>Earth circumference in meters: <span>40,075,000
</span>
<span>
(</span>326, 292, 068 people * 1.77m) / 40,075,000m = 14.411 times
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Question: Which of the following are appropriate units for power?

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Answer:

Watt  and Joule/sec are the appropriate units for power.

Explanation:

As per the question, the physical quantity given is power.

The power is defined as the rate of consumption of energy or the rate of doing work.

Let us consider W is the amount of work done by a body in time t .

Mathematically the power of that body is written as -

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The unit of work is joule and the unit of time is second.

Hence, the unit of power is joule/sec.

we know that one joule/sec. = one watt.

Hence, watt is also another unit of power. Newton-metre can not be a unit of power . It may be considered as a unit of work.

Similarly H.P/sec is also not a unit of power. Here H.P stands for horse power which is another unit of power . Hence, joule/sec. and watt are the appropriate units of power.

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