Mr Webber Stuff

Question 1

What is the Prefix value of a Picometer?

Answer 1

1 x 10*-12

Question 2

What is the Prefix value for a Nanometer?

Answer 2

1 x 10*-9

Question 3

What is the Prefix value for a Micrometer?

Answer 3

1 x 10*-6

Question 4

What is the Prefix value for a Millimeter?

Answer 4

1 x 10*-3

Question 5

What is the Prefix value for a kilometer?

Answer 5

1 x 10*3

Question 6

What is the Prefix value for a Mega?

Answer 6

1 x 10*6

Question 7

What is the Prefix value for a Giga?

Answer 7

1 x 10*9

Question 8

What is the Prefix value for a Tera?

Answer 8

1 x 10*12

Question 9

How do you find the Centre of Gravity?

Answer 9

• Hang a plug hole over a nail
• Punch some holes into a shape
• Hang the shape from the nail
• Trace with a pen the direction of the string
• Do this three times in different directions

Question 10

What helps with Stability?

Answer 10

Wide base

Low centre of Gravity

Question 11

What is the Weight equation?

Answer 11

W = m x g

Question 12

What is the Moment equation?

Answer 12

Moment = Force x Perpendicular turning distance

Question 13

What is the Principle of Moments?

Answer 13

For a system in equilibrium

- the sum of the clockwise moments EQUALS the sum of the anticlockwise moments

Question 14

What is Laminar Flow?

Answer 14

• No mixing of layers
• Minimal Drag
• Streamline flow

Question 15

What is Turbulent Flow?

Answer 15

• Mixing of layers
• Swirling currents
• Change in direction
• Energy is transferred to the surroundings

Question 16

What is Upthrust?

Answer 16

Weight of fluid displaced

Question 17

What is the Density equation?

Answer 17

m= V x Q

Question 18

What is Work Done?

Answer 18

Is the force needed to move an object over a certain distance

Question 19

What is Power?

Answer 19

Rate of energy released per second - Rate of energy transfer E/t

Question 20

What is Efficiency?

Answer 20

Percentage of useful energy from total input.

Question 21

What is the Efficiency Equation?

Answer 21

Useful energy in out/Total energy X 100

Question 22

What is ANOTHER equation for Efficiency?

Answer 22

Useful power transferred/Total power supplied

Question 23

What are the Trigonometry equations?

Answer 23

O A O

S H C H T A

Question 24

What is the Kinetic Energy Equation?

Answer 24

KE = 0.5 x m x v*2

Question 25

Using the KE equation what is the equation rearranged to V

Answer 25

V*2 = 2 x m x g x h

Question 26

What is the GPE equation?

Answer 26

G = mgh