where is the air pressure greater—at sea level or on a mountaintop? explain.

What is the meaning Torr?

The torr (symbol: Torr) is a unit of pressure based on an absolute scale, defined as exactly 1760 of a standard atmosphere (101325 Pa). Thus one torr is exactly 101325760 pascals (≈ 133.32 Pa). … It is often combined with the metric prefix milli to name one millitorr (mTorr) or 0.001 Torr.

In what direction S does air exert pressure?

Air exerts pressure in all directions. Gases exert pressure on the surface with which they come in contact. The pressure that a gas exerts on a surface is the result of gas particles colliding with the surface. Since the gas particles move randomly in all directions, they exert pressure equally in all the directions.

Which is true of the thermosphere?

The thermosphere has the highest air pressure of any layer of the atmosphere. B. The thermosphere is the hottest layer in the atmosphere, because it has the most carbon dioxide. … The thermosphere is hot because molecules in it absorb the high energy, short wavelengths of radiation from the Sun.

What is the pressure at the deepest part of the ocean?

While atmospheric pressure in the average home or office is 14.7 pounds per square inch (PSI), it is more than 16,000 PSI at the bottom of the Mariana Trench.

How does pressure work in the ocean?

In the ocean, pressure works the same way, but instead of just having a column of air over you, you also have the weight of all the water above you, pressing down on your lungs. … For every 10 meters you go below the surface, the pressure increases by one atmosphere.

How does pressure change in the ocean?

Water Pressure and Depth

As you go deeper into a body of water, there is more water above, and therefore a greater weight pushing down. This is the reason water pressure increases with depth. The pressure depends only upon the depth, and is the same anywhere at a given depth and in every direction.

What is the value of atmospheric pressure at sea level in n m2?

Question: The atmospheric pressure at sea level is 1.013 x105 N/m2. The unit of pressureN/m2 is also called a pascal (Pa). The surface area ofan average adult body is about 2 m2.

What is the air pressure in Denver Colorado?

For example, Denver, Colorado is about 1.6 kilometers (1 mile) above sea level. The atmospheric pressure of Denver drops to 0.85 kilograms per square centimeter (12 pounds per square inch) at this altitude.

What is the atmospheric pressure at sea level in cm of mercury column?

Therefore, we can say that; at standard sea-level conditions, the atmospheric pressure is equal to 76 cm of Hg column.

When the pressure is half of that at sea level what is the altitude?

When you reach an altitude of about 5,500 meters (about 18,000 feet), the air pressure is only about one half of what it was at sea level, which means that about half of the Earth’s atmosphere is already below you.

What changes occur with the increase in altitude from sea level?

Textbook solution

There will be a decrease in air temperature and pressure when the air content goes high from the sea level. Most of the air cools down when it goes high and rainfall occurs during this time. When there are increased altitudes of any mountains there will be an increase in rainfall.

What part of the atmosphere has the lowest air pressure?

The layer of the atmosphere that has a lowest pressure is the Thermosphere. The layer that has a greatest amount of pressure is the Troposphere. Our atmosphere is divided into 4 layers the lower atmosphere or the troposphere, stratosphere, mesosphere and thermosphere.

How do you find pressure at altitude?

What can be said about air pressure and the relationship between sea level and atmospheric pressure?

Air pressure has a direct influence on the sea level. … So high air pressure over a sea area corresponds to low sea level and conversely low air pressure (a depression) results in higher sea levels. This is called the inverse barometer effect.

What is the relationship between the altitude and air pressure and temperature?

Put another way, air pressure (i.e., density) decreases as altitude increases. Temperature varies with altitude, as follows: In the troposphere, temperature decreases as altitude increases.

Why is air pressure different at the top of a mountain?

Pressure at the top of a mountain…

Atmospheric pressure reduces with altitude for two reasons, both of which are related to gravity. … Molecules further away from the earth have less weight (because gravitational attraction is less) but they are also ‘standing’ on the molecules below them, causing compression.

Which instrument measures air pressure?

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