Physics GCSE Double Award

Electrical power =

Current x voltage

Voltage =

Current x resistance

Charge =

Current x time

Average speed =

Distance moved / time taken

Acceleration =

Change in velocity /time taken

Force =

Mass x acceleration

Pressure =

Force /area

Pressure difference =

Height x density x g

Moment =

Force x perpendicular distance from pivot

Wave speed =

Frequency x wavelength

Refractive index =

Sin(I)/ sin (r)

Sin (c) =

1/refractive index

Energy transfer =

Work done

Work done =

Force x distance moved in direction of force

Efficiency =

Useful energy output / total energy input

Weight =

Mass x g

Density =

Mass / volume

Gravitational potential energy =

Mass x g x height

Kinetic energy

1/2 x Mass x speed (2)

What is the symbol for Mass?

m

What is the symbol for area?

A

What is the symbol for volume?

V

What is the symbol for time?

t

What is the symbol for time period

T

What is the symbol for force?

F

What is the symbol for weight?

W

What is the symbol for speed/velocity?

s/v

What is the symbol for acceleration?

a

What is the symbol for density?

P (Greek)

What is the symbol for pressure?

P

What is the symbol for work/energy?

W/E

What is the symbol for power?

P

What is the symbol for frequency?

f

What is the symbol for wavelength?

Lambda (upside down y)

What is the symbol for electric charge?

Q

What is the symbol for potential difference (voltage)

V

What is the symbol for current?

I

What is the symbol for electrical resistance?

R

What is the symbol for radioactive activity?

A

What is the symbol for kilogram?

kg

What is the symbol for metre?

m

What is the symbol for square metre/square centimetre?

m(2)/cm(2)

What is the symbol for cubic metre?

m(3)

What is the symbol for second?

s

What is the symbol for Newton?

N

What is the symbol for metre per second?

m/s

What is the symbol for metre per second per second?

m/s(2)

What is the symbol for kilogram per metre cubed?

kg/m(3)

What is the symbol for gram per centimetre cubed?

g/cm(3)

What is the symbol for pascal?

Pa

What is the symbol for joule?

J

What is the symbol for watt?

W

What is the symbol for hertz?

Hz

What is the symbol for metre?

m

What is the symbol for coulomb?

C

What is the symbol for volt?

v

What is the symbol for amp?

A

What is the symbol for becquerel?

Bq

What is the symbol for ohm?

Omega

What is the density of a solid material?

Constant

What happens to the density of a solid when the temperature changes?

Increases the volume, smaller density

When does the density of a gas change?

If the pressure changes

What are the three different states?

Solid, liquid, gas

What is melting?

A substance changing state from solid to liquid

What is evaporation?

A substance changing state from liquid to gas

What is the structure of a liquid?

Random motion, close-packed irregular structure

What is the structure of solids?

Vibrate about fixed positions, close-packed regular structure

What force pulls all objects down on earth?

Weight

What pressure is the smallest area?

Highest pressure

What pressure does a largest area is made?

Lowest pressure

What is the pressure like in a liquid?

Same in all directions

What is the pressure difference in a liquid?

Proportional to the depth

Deeper under water, what is the pressure like?

Greater the pressure

In energy transfers, what happens to energy?

It is conserved

Is efficiency more than 1 or less than 1?

Less than 1

In energy flow diagrams, what does the width of the line indicate?

The amount of energy

What is conduction?

Heat energy passing from atom to atom, but the material does not move

What is convection?

When a liquid or has is heated, it expands, so volume increase so density decreases. Producing convection currents

What is radiation?

Heat energy transfer without using atoms

What does insulation do?

Reduce energy transfers

What do waves do?

Transfer energy and information without transferring matter

What are transverse waves?

Vibrations at 90 degrees to the direction of wave travel

What is wavelength?

Distance from one crest to the next crest

What is the amplitude?

The maximum distance from the equilibrium position

What is a longitudinal wave?

Vibrations parallel to the direction of the wave travel

What is frequency?

Number of waves per second

What is period?

Time for 1 complete wave to pass

What can electromagnetic waves pass through?

A vacuum

What are mechanical waves?

Waves that require a medium to pass through

What are electromagnetic waves?

A 'family' of transverse waves

What are some properties of electromagnetic waves?

Travel through a vacuum, travel at the same speed of light, differ in wavelength

What is the order of electromagnetic spectrum?

Radio, microwaves, infra-red, visible, ultraviolet, x-Ray, gamma ray

The order of the visible spectrum?

Red, orange, yellow, green, blue, indigo, violet

How can forces be expressed?

A push or pull of one object to another object

What is friction?

A force that acts when one solid surface slides over another

How does friction act?

Acts to oppose the motion, in the opposite direction

Can friction be an accelerating force or a retarding force?

Both

What happens when a force is applied to an object, that is not free to move?

The object changes shape or extends

Extension =

Stretched length - original length

What law do rubber bands not obey?

Hooke's Law