Formulae

Question 1

How do you calculate energy transferred? (Joules)

Answer 1

Specific heat capacity x mass x temperature change

J/kg x Kg x °C

Question 2

How do you calculate work done? (Joules)

Answer 2

Force applied x distance moved

Newtons x metres

Question 3

How do you calculate the change of GPE store in objects? (Joules)

Answer 3

weight x change of height

Newtons x metres

Question 4

How do you calculate GPE store? (Joules)

Answer 4

mass x Gravitational field strength x change of height

Kg x 10 N/kg on Earth x metres

Question 5

How do you calculate kinetic energy? (Joules)

Answer 5

0. 5 x mass x speed² / velocity²

0. 5 x Kg x metres / second²

Question 6

How do you calculate wave speed?

Answer 6

frequency x wave length
Hz x m
-lamda-

Question 7

How do you calculate pressure? (N/m²)

Answer 7

Force x Area

N x m²

Question 8

Height is proportional to speed an object travels.

Answer 8

GPE Lost = Kinetic Gained
m x g x h = 0.5 x m x v²
- masses cancel out -
g x h = 0.5 x v²

Question 9

How do you calculate energy transferred? (Joules)

Answer 9

Charge (Q) x Potential Difference

Coulombs x Voltz

Question 10

How do you calculate resistance? (Ω)

Answer 10

Potential Difference / Current

Voltz / Amps

Question 11

How do you calculate charge? (Coulombs)

Answer 11

Time x current

s x amps

Question 12

How do you calculate power? (Watts)

Answer 12

Current² x resistance
Amps x Ohms
I x Ω

Question 13

How do you calculate force on a magnetic field? (Newtons)

Answer 13

Magnetic Field Strength x Current x Length of wire
Tesla x Amps x Metres

or, F = B I L