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# How do you calculate the height of the atmosphere?

## How do you calculate the height of the atmosphere?

In Earth’s atmosphere, the pressure at sea level P0 averages about 1.01×105 Pa, the mean molecular mass of dry air is 28.964 u and hence 28.964 × 1.660×10−27 = 4.808×10−26 kg, and g = 9.81 m/s². As a function of temperature the scale height of Earth’s atmosphere is therefore 1.38/(4.808×9.81)×103 = 29.26 m/deg.

## What is the formula for calculating atmospheric pressure?

Atmospheric pressure is the pressure caused by the mass of our gaseous atmosphere. It can be measured using mercury in the equation atmospheric pressure = density of mercury x acceleration due to gravity x height of column of mercury.

How do you calculate pressure altitude?

To calculate pressure altitude without the use of an altimeter, subject approximately 1 inch of mercury for every 1,000-foot increase in altitude from sea level. For example, if the current local altimeter setting at a 4,000-foot elevation is 30.42, the pressure altitude would be 3,500 feet: 30.42 – 29.92 = 0.50 in.

### How do you calculate atmospheric pressure in kPa?

1 atm = 101,325 Pascals = 760 mm Hg = 760 torr = 14.7 psi. The prefix “kilo” means “1,000”, so one kilopascal = 1,000 Pa. Therefore, 101.325 kPa = 1 atm = 760 torr and 100 kPa = 1 bar = 750 torr.

### What is the scale height of Earth?

Calculation of Earth’s Scale Height We choose a reasonable value for the average temperature (288 K) and an acceleration of gravity of 9.81 m/s2, and obtain a scale height of around 8400 m.

How is pressure related to height?

Pressure with Height: pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.

## How do you use scale height?

Look down at the scale to the part where measuring tool extends from its base. That number will reveal your height in inches. If that number is 72, you are six feet tall. If it is 71, you are 5-foot-11.

## What is the scale height of Mars in KM?

11.1 km
Mars has a higher scale height of 11.1 km than Earth (8.5 km) because of its weaker gravity.

How to calculate atmospheric pressure at present location?

Calculates the atmospheric pressure at the present location from the altitude and temperature, and sea-level pressure. Sea-level pressure P0 hPa at present location Altitude h

### How to calculate the pressure at an altitude of K?

K = °C then the pressure at an altitude of h = m =ftis Ph= mmHg =inHg =kPa This calculation uses m=amu M= kg/mol. Note that the model calculation assumes a uniform temperature, and is therefore not a realistic model of the atmosphere.

### What is the formula for the pressure at ground level?

If the atmospheric pressure at ground level is. P 0 = mmHg = inHg. = kPa. and the temperature is uniform at. K = °C. then the pressure at an altitude of. h = m = ft is. P h = mmHg = inHg.

Where do you find the barometric formula for height?

The Barometric Formula Starting at some point in midair, the change in pressure associated with a small change in height can be found in terms of the weightof the air. The change in pressure depends on density,but ρ depends on the pressure as follows: The solution for the change from the ground