M8.1- Physics Of The Atmosphere Flashcards
What is the equation for speed?
Speed= Distance/Time
What is the equation for acceleration?
A= Change in speed/ Time taken
Gravity equals what (meters per second squared)
9.8 meters per second squared
Equation for work?
Force multiplied by Distance
(N x m)
Work is denoted by what value?
Joules
Percentages of gas in the atmosphere?
Nitrogen 78%
Oxygen 21%
Other gases 1%
5 main regions of atmosphere?
Troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere
Troposphere is between what earth surface to where?
8-14.5 km high
What layer of atmosphere is weather found in?
Troposphere
What is the tropopause?
The boundary between troposphere and stratosphere
17km above equator
9km above polar regions
Where does stratosphere start and where does it extend to?
Starts above troposphere and extends 50km high
What section of atmosphere would aircraft cruise in?
Stratosphere
Tropopause can be described as what sort of layer?
Isothermal layer-constant temperatures throughout
The stratosphere contains what protective layer?
Protective ozone layer
Temperature is around what at stratosphere?
-56.5 degrees Celsius
What is pressure at sea level?
1013.25 hPa
14.7 PSI
Temperature at sea level?
15 degrees Celsius
Density of air at sea level?
1.225 kg/m cubed
As altitude increases what decreases?
Pressure
Density
Temperature
ISA values at sea level?
Pressure 1013.25 hPa
Density 1.225 kg/m cubed
Temperature 288.15 K or 15 degrees Celsius
Temperature decreases with altitude at rate of what?
6.5 degrees Celsius per Km
What is the value of speed of sound?
339.4
Power is measured in what?
Watts
Newton meters per second
Speed of sound is what at higher altitudes due to what?
Lower due to lower temperatures
