8.1

Question 1

What are the 4 fundamental units?

Answer 1

• mass
• length
• time
• temperature

Question 2

What is the mass of 1 kg equal to?

Answer 2

The volume of 1L of pure water at 4 degreesC

Question 3

What is speed denoted by?

Answer 3

V

Question 4

What is distance denoted by?

Answer 4

M

Question 5

What is time denoted by?

Answer 5

S

Question 6

How is a metre more precisely defined?

Answer 6

A certain number of wavelengths of a particular colour of light

Question 7

When was the metre first established as a standard unit of length?

Answer 7

1790

Question 8

What is the unit of measurement for time?

Answer 8

Seconds

Question 9

How is the second now defined?

Answer 9

As a fraction of the unchangeable speed of light

Question 10

What is the unit of measurement for temperature?

Answer 10

Kelvin

Question 11

The Kelvin scale only has positive numbers, true or false?

Answer 11

True

Question 12

How many Celsius is 1 Kelvin equal to?

Answer 12

1

Question 13

What are the basic quantities of aerodynamics?

Answer 13

Speed
Acceleration
Power
Pressure
Force
Work

Question 14

What is speed?

Answer 14

The distance a moving object covers in a unit of time

Distance/time

Question 15

What is acceleration?

Answer 15

Change in speed divided by the time during which the change takes place

Question 16

What is acceleration measured in?

Answer 16

Metres per square second

Question 17

What is gravity denoted by?

Answer 17

G

Question 18

What is the value of gravity?

Answer 18

9.8m/s2

Question 19

What is Newton’s second law?

Answer 19

Force is equal to mass x acceleration

Question 20

What is weight measured in?

Answer 20

Newtons

Question 21

What is work?

Answer 21

When an object is moved over a distance

Question 22

What is the equation for work?

Answer 22

N x m

Force x distance

Question 23

What is work denoted by?

Answer 23

Joule (J)

Question 24

What is work measured in?

Answer 24

Newton metres

Question 25

What is power?

Answer 25

Work over time

Or

Force x distance /time

Question 26

What is power measured in?

Answer 26

Watts

Question 27

What is pressure?

Answer 27

The force acting on a unit of area

Question 28

What is pressure denoted by?

Answer 28

Pascal (Pa)

Question 29

How is static pressure calculated?

Answer 29

Height x density x gravity

Question 30

How is dynamic pressure denoted?

Answer 30

q

Question 31

How is dynamic pressure calculated?

Answer 31

1/2 density x speed2

Question 32

What is 1 bar equal to?

Answer 32

100,000 pascals

Question 33

What is the speed of sound denoted by?

Answer 33

a

Question 34

What does the speed of sound depend on?

Answer 34

Temperature

Question 35

When is the speed of sound lower?

Answer 35

High altitudes due to lower temperature

Question 36

What speed is Mach 1?

Answer 36

The speed of sound

Question 37

How is the mach number calculated?

Answer 37

Speed of aircraft / speed of sound

Question 38

What speeds are sub-sonic?

Answer 38

Below the speed of sound, up to the critical Mach number

Question 39

What speeds are in the transonic region?

Answer 39

Some below and some above speed of sound.

Between critical Mach and 1.3 Mach

Question 40

What speeds are supersonic?

Answer 40

Above speed of sound

Higher than Mach 1.3

Question 41

What is the atmosphere?

Answer 41

The whole mass of air extending upwards from the surface of the earth