Astronomy
1st Edition
ISBN: 9781938168284
Author: Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher: OpenStax
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Textbook Question
Chapter 16, Problem 19E
Earth’s atmosphere is in hydrostatic equilibrium. What this means is that the pressure at any point in the atmosphere must be high enough to support the weight of air above it. How would you expect the pressure on Mt. Everest to differ from the pressure in your classroom? Explain why.
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Atmospheric pressure on Earth at its surface is 101 KPa (101 kilopascals or 101,000 N/m2). Which of these statements is true.
If we pump out the gas in a closed container leaving only 1 billionth of the original gas, there will only be about 1000 atoms left in the container.
The number of atoms or molecules in the container depends on what the gas is composed of.
If we pump out the gas in a closed container leaving only 1 millionth of the original gas there will still be more than 1013 (10,000 billion) atoms per cm3 in the container.
The number of atoms or molecules in the container does not depend on temperature.
Make a plot of pressure vs altitude for a hydrostatic, isothermal atmosphere on Earth, assuming a surface pressure of 1 atm.
Atmospheric pressure on Earth at its surface is 101 KPa (101 kilopascals or 101,000 N/m2). Which of these statements is true?
If we pump out the gas in a closed container leaving only 1 billionth of the original gas there will still be more than 1010 (10 billion) atoms per cm3 in the container.
If we pump out the gas in a closed container leaving only 1 billionth of the original gas there will be fewer than 100 atoms per m3 in the container.
When we reduce the pressure in the container while keeping the temperature constant, the number of atoms per m3 must stay constant.
At 1 atmosphere, the number of atoms/m3 in air at room temperature is about 109, one billion atoms.
Chapter 16 Solutions
Astronomy
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