Equations

Question 1

Charge
Time
Current

Answer 1

Charge = current x time
Charge(Q) = Coulombs
Current(I) = Amps
Time(s) = Seconds

Question 2

Area
Pressure
Force

Answer 2

Pressure = Force / Area
Pressure (N/m^3)
Force (N)
Area (m^3)

Question 3

Specific latent heat equation

Answer 3

E = mL
E = Energy (j)
m = mass (kg)
L = specific latent heat (j/kg)

Question 4

Kinetic energy equation

Answer 4

Kinetic energy = 1/2 mass x velocity^2
Ek = 1/2mv^2

M= kg
V= m/s
Ek= J

Question 5

Gravitational potential equation

Answer 5

Gravitational potential energy = mass x gravitational field strength x height
Ep = mgh

M= kg
G= 9.8 n/kg
H= m
Ep= J

Question 6

Specific heat capacity equation

Answer 6

ΔE = MCΔT

ΔE = change in energy (J)
M = mass (kg)
C = specific heat capacity (J/kg°C)
ΔT = change in temperature (°C)

Question 7

Power equation
(In terms of work done and time taken)

Answer 7

P = W/t

P = power in watts (w)
W = work done (or energy transferred)
T = time in seconds (s)

Question 8

Power equation
(In terms of current and potential difference)

Answer 8

P = IV

P = power in watts
I = currents in amps (a)
V = potential difference in volts (v)

Question 9

Power equation
(In terms of current and resistance)

Answer 9

P = I^2 R

P = power
I = current
R = resistance

Question 10

Energy transferred equation
(In terms of charge and potential difference)

Answer 10

E = QV

E = energy transferred (j)
Q = charge flow (c)
V = potential difference (s)

Question 11

Density equation

Answer 11

p = m/v

p = density (kg/m^3)
M = mass (kg)
V = volume (m^3)