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M8 > 8.1 > Flashcards

8.1 Flashcards

1
Q

What letter is speed denoted by?

A

V

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2
Q

What is distance denoted by?

A

m

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3
Q

What is time denoted by?

A

s

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4
Q

What is the mass of one kg defined by?

A

A piece of platinum alloy at the office of weights and measurement in Paris.

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5
Q

What is the mass of 1kg equal to in terms of litres?

A

1 litre of pure water at temperature of 4 Celsius.

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6
Q

What is the formula for speed?

A

Speed = Distance / Time

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7
Q

What is the formula for acceleration?

A

Acceleration = Change of speed / Time

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8
Q

What is acceleration due to gravity denoted by?

A

g

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9
Q

What is the average of acceleration due to gravity?

A

10 metres per second.

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10
Q

What is the second law of Isaac Newton?

A

Force equals mass multiplied by acceleration.

Force = mass x acceleration

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11
Q

What is force and weight measured in?

A

Newton’s.

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12
Q

What is the formula for weight?

A

Weight = mass x acceleration due to gravity

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13
Q

What is the formula for work?

A

Work = Force x Distance

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14
Q

What is work denoted in?

A

Joule (J)

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15
Q

What is the formula for power?

A

Power = Work / Time

Or

Power = Force x Distance / Time

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16
Q

What is power measured in?

A

Watts or

Newton metres per second

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17
Q

What is pressure?

A

Force acting on a unit of area.

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18
Q

What is pressure denoted by?

A

Pascal (Pa)

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19
Q

What is pressure measured in?

A

Newton’s per square metre.

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20
Q

How is static pressure calculated?

A

Height x Density x Gravity

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21
Q

What direction does dynamic pressure flow?

A

In one direction only in direction of flow.

22
Q

What is dynamic pressure denoted by?

A

q

23
Q

How is dynamic pressure calculated?

A

Half the density x Speed squared

24
Q

What is the static pressure for aircraft technical systems denoted by?

A

bar

25
Q

What is static pressure for aircraft technical systems measured in?

A

deca-Newton’s per square centimetre

26
Q

What is one bar equal to??

A

100,000 pascal.

27
Q

What is the formula for pressure?

A

Pressure = Force / Area

28
Q

What is the formula for speed of sound?

A

Square root of temperature x 20

29
Q

What is the speed of sound denoted by?

A

a

30
Q

What must the temperature for speed of sound be expressed in?

A

Kelvin

31
Q

If the temperature is lower, what would happen to the speed of sound?

A

The speed of sound is lower.

32
Q

What is the pressure wave created by an aircraft flying at the speed of sound?

A

Shock wave.

33
Q

Must the aircraft travel less or more than the speed of sound?

A

Less than

34
Q

What is the Mach number used for?

A

Keep the pilot informed of the relationship between the speed of the aircraft and speed of sound.

35
Q

What is the formula for Mach number (M)?

A

Mach number = Speed of aircraft / speed of sound

36
Q

What speeds of aircraft are in the subsonic region?

A

Below the speed of sound.

Region up to critical Mach number

37
Q

What are the speeds around the aircraft in transonic regions?

A

Some below the speed of sound and some above.

Between critical Mach number and 1.3 Mach

38
Q

What happens in the supersonic region?

A

All speed around the aircraft are higher than the speed of sound

(Mach numbers higher than 1.3)

39
Q

What is the troposphere?

A

Lowest layer in earths atmosphere.

different weather conditions

40
Q

What is the stratosphere?

A

Layer above the troposphere

No rain clouds and temp does not change with change in altitude.

41
Q

What is the tropopause?

A

Boundary between troposphere and stratosphere.

8km over North Pole, 16m over equator

42
Q

What is the standard atmosphere known as?

A

ISA (ICAO Standard Atmosphere)

43
Q

What is the standard altitude for the tropopause?

A

11km

44
Q

Under standard conditions, what does the temperature decrease with an altitude rate of?

A

6.5 degrees per kilometre.

45
Q

What is the standard temperature at the tropopause?

A

-56.5 Celsius

46
Q

Is there a change of temperature at the stratosphere?

A

No.

47
Q

What happens with density and pressure as altitude increases?

A

Decreases.

48
Q

What is the standard temperature at sea level?

A

288 Kelvin

49
Q

How is static pressure found?

A

Height x density x gravity.

50
Q

What are the standards for ISA temperature, density and pressure?

A 
Temperature = 288K
Density = 1.225kg/m3
Pressure = 1013.25 hecta Pa

M8 (4 decks)

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