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3 years ago

6

In countries where there is very hot and very cold weather, should the gaps between the lengths of railway track be wider or nar

rower?

1 answer:

kipiarov [429]3 years ago

5 0

They should be bigger as if it is hot the tracks will expand as it is made of metal and then there is more room for it to expand or contract

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find the potential energy of an aircraft weighing 10000 bs at 5000 ft true altitude and 125 kts true air speed

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Answer:

$U=5*10^7ft.Ib$

Explanation:

From the question we are told that

Weight $W= 10000bs$

Altitude $H=5000ft$

Speed $V=125kts\\1kts=0.514m/s\\V=125*0.514=>64.25m/s$

Generally the equation for Potential energy ids mathematically given as

$Potential\ Energy\ U=mgh$

$U=Wh$

$U=10000*5000$

$U=5*10^7ft.Ib$

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