SM1

Question 1

The troposphere

Answer 1

8- 14.5 km high.
Densest layer
Contains almost all weather.
Most light aircraft fly here.

Question 2

The tropopause

Answer 2

Is a thermodynamic gradient-stratification layer.
Marks the end of the troposphere.
Average altitude of 11km. (36,000 feet)
Is the regular cruising altitude for modern jets.
Air is thinner so less drag.

Question 3

Stratosphere.

Answer 3

Goes up to 50km / 31 miles.
Temp is generally constant at -56.5 degrees
Many jets can cruise here.

Question 4

Factors which effect the quality of the air

Answer 4

Pressure.
Temperature.
Density.
Humidity.

Question 5

1atm in mmHg

Answer 5

760

Question 6

Atmospheric density at sea level.

Answer 6

1.225 kg/m^3

Question 7

Humidity and relative humidity.

Answer 7

Humidity is greatly affected by temperature.

Density decreases when humidity increases.

Pressure, temp. And humidity all effect air density.

Question 8

Equation for the speed of sound.

Answer 8

A = 20 x root T