8.1 Physics

Question 1

What is the SI system based on?

Answer 1

The metric system, must be used by law throughout the world

Question 2

What are the fundamental units in physics/aerodynamics?

Answer 2

Mass
Length
Time
Temperature

Question 3

What is mass measured in

Answer 3

Kilograms (KG)

Question 4

What is the mass of 1KG defined by

Answer 4

A piece of platinum alloy at the office of weights, Paris.

Volume of 1L of pure water at 4 degrees Celsius

Question 5

How is length measured

Answer 5

Meters (M)

Question 6

What is light defined as

Answer 6

A fraction of unchangeable speed of light

Question 7

What is the unit measure of temperature

Answer 7

Kelvin (K)

Question 8

What are the 6 basic fundamental quantities

Answer 8

Speed
Acceleration 
Power 
Pressure
Force
Work

Question 9

What is speed

Answer 9

A distance an object covers over a unit of time

Question 10

What is acceleration

Answer 10

Time change takes place

Question 11

What is acceleration denoted by

Answer 11

M/s squared

Question 12

What is speed denoted by

Answer 12

V (velocity)

Question 13

What is acceleration due to gravity denoted by

Answer 13

g

Question 14

What is the average acceleration due to gravity

Answer 14

9.81 meters/second squared

Question 15

What is weight measured in

Answer 15

N (newtons)

Question 16

What is Newton’s second law

Answer 16

F=MA

Question 17

What is work done

Answer 17

An object moved over a distance

Work=NM
Work = force x distance

Question 18

What is work done denoted by

Answer 18

Joule (j) also measured in newton meters

Question 19

What is power

Answer 19

Work over time or more specifically

Time

Question 20

How is power measured

Answer 20

Watts ( also n/m per second)

Question 21

What is pressure

Answer 21

Pressure = force
——-
Area

Question 22

What is pressure donated by

Answer 22

A small p ( measured in newton per square meter)

Question 23

How is static pressure calculated

Answer 23

Height x density x gravity

Question 24

Which way does dynamic pressure act

Answer 24

The direction of the flow

Question 25

How is dynamic pressure calculated

Answer 25

1/2 density x V squared

Question 26

What is dynamic pressure denoted by

Answer 26

Small q

Question 27

What is 1 bar equal to in pascal

Answer 27

100,000

Question 28

How is static pressure denoted for aircraft technical systems

Answer 28

Bar/ deca newtons per square centimetre

Question 29

What is the speed of sound denoted by

Answer 29

a

Question 30

Sound waves are the same as what

Answer 30

Pressure waves

Question 31

Is the speed of sound higher or lower at low temperatures

Answer 31

Lower

Question 32

What are the 3 main categories of aircraft speed

Answer 32

Subsonic Transonic Supersonic

Question 33

What is the Mach number used for

Answer 33

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

Question 34

What is the equation of Mach number

Answer 34

Speed of aircraft ----------------- Speed of sound

Question 35

What is the lowest layer in the atmosphere

Answer 35

Troposphere

Question 36

What atmospheric layer would you find rain clouds

Answer 36

Troposphere

Question 37

What is the tropopause

Answer 37

The boundary layer between the troposphere and stratosphere

Question 38

What is the stratosphere

Answer 38

Atmospheric layer above the troposphere - no rain clouds are found here Temp does not change as altitude increases

Question 39

What are the heights is the tropopause over the - north/ south poles - equator

Answer 39

- 8KM over north and south poles | - 16KM over equator

Question 40

What variables can vary in the troposphere

Answer 40

Temperature, pressure, density

Question 41

A standard atmosphere was introduced by who

Answer 41

ICAO

Question 42

Standard altitude of tropopause above earth is?

Answer 42

11KM

Question 43

Does temperature change at all in the tropopause

Answer 43

Yes, at the rate of 6.5 degrees per KM -56.5 at height of tropopause No temp change in stratosphere

Question 44

What usually decreases with altitude

Answer 44

Density and pressure

Question 45

What are density, temperature, pressure at sea level

Answer 45

Temp - 288k Density - 1.225 kg/m cubed Pressure - 1013.25 hecto pascal