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liberstina [14]
4 years ago
12

As an airplane rises through the atmosphere, machines cause the pressure inside the cabin to decrease. As the airplane descends

toward Earth, machines cause the pressure inside the cabin to increase. Based on your observations from the Can Crush Lab, explain why these changes in pressure are necessary
Social Studies
2 answers:
Scilla [17]4 years ago
7 0

Answer:

<h2>Because pressure change according heights.</h2>

Explanation:

So, human begins need several variable to exist and pressure is one of them, we need to have a exact amount of pressure to can stand, jump, even breath. So, when you go up, you change your distance from Earth surface and the result is that your are introducing yourself into a different pressure environment that could bring you problems.

So, in order to that not happen, pressure must be change.

MA_775_DIABLO [31]4 years ago
4 0
T<span>hey are necessary so the atmospheric pressure that is experienced on land is simulated and so </span>people can breathe properly without having their heads explode or faint.
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Two cities are 45 miles apart. Two trains, with speeds of 70 mph and 60 mph, leave the two cities at the same time so that one i
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Answer:

The correct answer is  27' (minutes). The problem actually has only one solution.

Explanation:

  • We have to part from the basic <em>speed-distance-time</em> formula:

s=d/t

  • The time until they are distanced 10 miles is the same since the two trains leave at the same moment. We will call that time: t
  • We will call the first train: A
  • d1 is the distance train A traveled until it is distanced 10 miles from train B

70=d1/t

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  • We will call the second train: B
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  • So, the distance between A and B when the trains leave is: 45 miles

d1 + d2 + 10 = 45

70t + 60t = 35

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t=27’

The problem actually has only one solution.

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