8.1 Flashcards
What are the gases that makes up the atmosphere
21% oxygen
78% nitrogen
1% other gases like carbon and argon
The atmosphere is divided into 5 main regions what r they
The troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere
Tell me about troposphere
It’s to do with weather and the layer is dense up to 8 - 14.5km from ground level
If density decreases when ….
Humidity increases
Humidity is greatly affected by….
Tempt
What affects air density
Pressure tempt and humidity
What are the ISA values at sea level
Pressure is 1013.25 hpa
Density is 1.225kg/m^3
Tempts is 288.15 or 15°C
How do you find acceleration
Change in speed / time take
V2 - v1 / time
Equation for work done
Work = N * m = nm
Equation for power
Power = Force * distance over time
Watts = Nm/s
Formula for speed of sound
a = 20 * Square root of tempt [m/s]
Make sure the tempt is kelvin
Why is the speed of sound lower at high altitude
Tempt is lower
