Physics

Front 1

What is the formula for energy transfer?

Back 1

Energy Transferred = Mass x SpecificHeatCapacityx temperature change

Front 2

What is the formula for efficiency?

Back 2

Efficiency = useful energy out / total energy in

Front 3

what is the resistance equation

Back 3

voltage = current x resistance

(vanity is ridiculous)

Front 4

What is the formula for electrical power?

Back 4

Electrical Power = Current x Voltage

(peasants in Virginia)

Front 5

What is the formula for wave speed?

Back 5

wave length = velocity / frequency

Front 6

What is the formula for force?

Back 6

Force = Mass x Acceleration

Front 7

What is the formula for momentum?

Back 7

Momentum = Mass x Velocity

Front 8

What is the formula for force acting?

Back 8

Force Acting = Change in Momentum / Time

Front 9

What is the formula for work done?

Back 9

Work Done = Force x Distance

Front 10

What is the formula for power?

Back 10

Power = Work Done / Time

Front 11

What is the formula for charge?

Back 11

Total Charge = Current x Time

Front 12

What is the formula for a moment?

Back 12

Moment = Force x Perpendicular Distance

Front 13

What is the formula for energy transferred

Back 13

Energy Transferred = Work Done

Front 14

What is the formula for density?

Back 14

Density = Mass / Volume

Front 15

What is acceleration?
What is the formula for acceleration?

Back 15

Acceleration = Change in Velocity / Time Taken

Front 16

What is the formula for gravitational potential energy?

Back 16

Gravitational

Potential = Mass x Gravity x Height

Energy

Front 17

What is the formula for weight?

Back 17

Weight = Mass x Gravity

Front 18

What is the formula for pressure?

Back 18

Pressure = Force / Area

Front 19

What is the formula for transformers?

Back 19

The ratio of turns of wire in the two coils is equal to the ratio of the voltages of the two coils.

Np/Ns = Vp/Vs

Front 20

What is the rule about power in transformers?

Back 20

Power in = Power out

Front 21

What is the formula for pressure difference?

Back 21

Pressure Difference = Height x Density x Gravity

Front 22

What is the formula for refractive index?

Back 22

Refractive Index = Sin(angle of incidence) / Sin(angle of refraction)

Front 23

What is momentum?

Back 23

All moving objects have momentum.

Momentum is the tendency for an object to keep moving in the same direction.

Front 24

What is velocity?

Back 24

Velocity is the speed of an object moving in a particular direction.

Front 25

What is acceleration?

Back 25

Acceleration is the rate in which an object gains velocity (speed).

Front 26

What are the three magnetic elements?

Back 26

Cobalt

Nickel

Iron

Front 27

What are electromagnets?

Back 27

Wires carrying a current have a magnetic field around them.

Electromagnets are solenoids where current baring wire are wrapped around a metal, to produce a strong magnetic field which can be switched on and off.

Front 28

What is Flemming's Left Hand Rule?

Back 28

THumb = THrust

First Finger = Field

SeCon Finger = Current

Front 29

What affects the strength of an electromagnet?

Back 29

Size of Current

Number of Turns of wire

Having an Iron Core

Front 30

What is the Motor affect?

Back 30

A current carrying wire in a magnetic field will experience a force.

Front 31

What is electromagnetic induction?

Back 31

When a wire in a complete circuit is moved in a magnetic field a current is induced in said wire.

Front 32

What affects the size of the current induced in electromagnetic induction?

Back 32

Speed of movement

Magnetic field strength

Number of turns of wire

Front 33

What are transformers used for?

Back 33

They reduce energy loses by thermal heat loss in cables, when distributing electricity in the national grid, by making the current very low.

Front 34

What is terminal velocity?

Back 34

Terminal Velocity is the point in which an object can accelerate no further.

Eg. When the forces of drag and weight, on a free faller are equal, said free faller cannot fall any faster; so therefore has reached his terminal velocity or fastest possible speed.

Front 35

What is Newton's First Law?

Back 35

A object will continue at a constant velocity unless acted upon by an external resultant force.

Front 36

What is Newton's third law?

Back 36

If object A exerts a force on object B then the object B will exert an equal but opposite force on object A.

Front 37

What happens in an earth wire?

Back 37

Fault occurs

Current flows through earth wire with low resistance

High current flows through earth and live wires

Fuse melts so circuit breaks

Front 38

What is D.C?

Back 38

Direct Current doesn't alternate and comes from things like batteries and solar panels.

Front 39

What is A.C?

Back 39

Alternation Current changes direction a lot and comes from the mains.

Front 40

What is static electricity?

Back 40

Static Electricity is caused by friction between two insulators.

Electrons move from one insulator to the other, causing conflicting attractions, so the insulators now attract.

Front 41

What are alpha particles?

Back 41

Alpha Particles are helium nuclei

They have 2 protons and two neutrons

They have a positive charge

They are slow moving and ionising They are easily stopped by skin or paper

Front 42

What are beta particles?

Back 42

Beta Particle are just single electrons

They move quite quickly

They are moderately ionising

They are negatively charged

They are stopped by thin aluminium

Front 43

What are gamma waves?

Back 43

Gamma Waves have no mass

They are weakly ionising

They're very harmful

They have no charge Stopped only by thick lead

Front 44

What are two examples of background radiation?

Back 44

Radon Gas

Cosmic Rays

Front 45

What is nuclear fission?

Back 45

In nuclear fission one neutron hits a radioactive nucleus (eg. Uranium)

The parent nucleus splits into two daughter nuclei and some neutrons

These neutrons then go on to hit more parent nuclei