Physics

Question 0

What is velocity

Answer 0

Speed in a given direction

Question 1

Formula for speed

Answer 1

Distance divided by time

Question 2

What is Acceleration

Answer 2

The change in velocity per second

Question 3

What is the formula for acceleration?

Answer 3

Change in velocity divided by time taken

Question 4

What is mass?

Answer 4

The mass of an object is the amount of matter it has in it

Question 5

What is the formula for density ?

Answer 5

Mass divided by volume

Question 6

What is a force ?

Answer 6

A force is anything which causes an object to move or change it’s velocity

Question 7

How can forces be measured ?

Answer 7

By using a spring balance

Question 8

What is hookes law ?

Answer 8

The extension of a spring is in direct proportion to the force that is stretching it.

Question 9

What is friction?

Answer 9

Friction is the force which prevents easy movement between two objects in contact

Question 10

What is work?

Answer 10

Work is done when a force moves an object

Question 11

What is the formula for work?

Answer 11

Force x distance

Question 12

What is work measured in ?

Answer 12

Joules

Question 13

What is power ?

Answer 13

Power is the rate at which work is done

Question 14

What is power measured in ?

Answer 14

Watts

Question 15

What is the formula for power ?

Answer 15

Work divided by time

Question 16

What is weight?

Answer 16

The weight of an object is the force of gravity acting on it

Question 17

What is weight measured in?

Answer 17

Newtons

Question 18

What is a lever?

Answer 18

A lever is a rigid body which is free to turn about a fixed point called the fulcrum

Question 19

What is the formula for a moment of a force?

Answer 19

Force x perpendicular distance from the fulcrum

Question 20

When is the lever balanced ?

Answer 20

A lever is balanced , when the clockwise and anticlockwise moments are equal

Question 21

What is the formula for pressure ?

Answer 21

Force divided by area

Question 22

What is the unit of measurement for pressure ?

Answer 22

Pa

Question 23

What is a barometer ?

Answer 23

It is used to measure atmospheric pressure

Question 24

What is an insulator ?

Answer 24

A substance which does not allow heat to pass through it easily

Question 25

What chemical is added to show convection currents in a liquid ?

Answer 25

Potassium permanganate

Question 26

What is radiation ?

Answer 26

The transfer of heat in days , from a hot object without needing a medium to pass through it

Question 27

What is a bimetallic strip

Answer 27

It consists of two metal riveted together . The copper expands more than the iron when heated

Question 28

What are conductors ?

Answer 28

A substance that allows heat to pass through it easily

Question 29

What does the amount of heat depend on ?

Answer 29

It’s temperate , it’s mass and what substance it is

Question 30

What is latent heat?

Answer 30

Latent heat is the heat used to change the state of a substance

Question 31

What liquid do thermometers contain?

Answer 31

A mercury or a alcohol

Question 32

Why is a light a form of energy ?

Answer 32

Because it can makes things move example crooke’s radiometer

Question 33

What is a shadow ?

Answer 33

Is the total or partial darkness behind an object blocking the light

Question 34

What is reflection ?

Answer 34

When Light reflects off a surface

Question 35

What is refraction?

Answer 35

Is the bending of light as it passes from one medium to another

Question 36

Explain a convex lex

Answer 36

Bends the light rays together at a point

Question 37

Explain a concave lens

Answer 37

It spreads out the rays of light

Question 38

What is white light a mixture of ?

Answer 38

Seven different colours

Question 39

What re the seven colour of white light called ?

Answer 39

The spectrum of white light

Question 40

White light into its colours is called what?

Answer 40

Dispersion