The answer is true about the cabins in commercial airliners that require pressurization.
<h3>Why are the cabins of commercial airplanes pressurized?</h3>
Airplanes are pressurized because the air is very thin at the high altitude where they fly. The passenger jet has a cruising altitude of about 30,000 - 40,000 feet. At this altitude or height, humans can't breathe very well and our body gets less amount of oxygen. Most aircraft cabins are pressurized to an altitude about 8,000 feet. This is called cabin altitude. Aircraft pilots have access to the control's mode of a cabin pressure control system and if needed it can command the cabin to depressurize.
So we can conclude that cabins in commercial airliners require pressurization because of the greater pressure of the surrounding environment.
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Answer:
Personal Health is the ability to take charge of your health by making conscious decisions to be healthy.
Answer:
b. It is subject to a net force of zero
Explanation:
F = m*a
F = force
m = mass
a = acceleration
Since the object is moving at a constant velocity not speeding up or slowing down and moving in a sight line. All the forces that are acting on the object are canceling each other out so the answer is:
b. It is subject to a net force of zero
On Earth, the air becomes less dense and loses pressure as it rises in height. There is a bad correlation between the two variables.
<h3>What is atmosphere?</h3>
The layers of gases that envelop a planet or other celestial body are its atmosphere. About 78% of the gases in the Earth's atmosphere are nitrogen, 21% are oxygen, and 1% are other gases.
<h3>What is air pressure?</h3>
Everything you touch is pressed upon by the weighty air that surrounds you. This pressure is referred to as air pressure or atmospheric pressure. It is the force that the air above a surface applies to it while gravity pulls the surface toward Earth. A barometer is frequently used to measure atmospheric pressure.
<h3>What is altitude?</h3>
Height above sea level is how altitude is defined. Air pressure and height are two different but related ideas. In fact, they are so closely related that many airplane altimeters base their altitude calculations on air pressure. And one can also do the opposite; mountain climbers can determine whether they need to bring an oxygen supply by forecasting the air pressure on a mountaintop with a known elevation.
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1500 m
<u>Explanation:</u>
Step 1:
From the basics of Sound Physics,
Distance = (Speed * Time) / 2
Here Speed = 1500 m/s
Time = 2 Seconds
Step 2:
Distance = ( 1500 * 2)/2
= 1500 m
