Equations

Question 1

What is the equation for charge flow?

Answer 1

QIt
Q is charge in Coulombs
I is current in Amperes
t is time in seconds

Question 2

What is the equation for power?

Answer 2

PIV
P is power in Watts
I is current in Amperes
V is voltage in Volts

Question 3

What is the equation for power without voltage (p.d)?

Answer 3

PI²R
P is power in Watts
I² is current in Amperes
R is resistance in Ω

Question 4

What is the equation for energy transferred?

Answer 4

EPt
E is energy transferred in Joules
P is power in Watts
t is time in seconds

Question 5

What is the equation for voltage (p.d)?

Answer 5

VIR
V is voltage in Volts
I is current in A
R is resistance in Ω

Question 6

What is the equation for energy transferred (without power or time)?

Answer 6

EQV
E is energy transferred in Joules
Q is charge flow in Coulombs
V is voltage in Volts

Question 7

What is the equation for kinetic energy?

Answer 7

E(k) 0.5 m v squared.
M is mass in kg.
V is speed in m/s
E(k) is kinetic energy in J.

Question 8

What is the equation for gravitational potential energy?

Answer 8

E(p) = m g h
M is mass in kg.
G is gravitational field strength in N / kg.
H is height in m.
E(p) is gravitational potential energy in J.

Question 9

What is the equation for elastic potential energy?

Answer 9

E(e) = 0.5 k e squared.
K stands for spring constant in N / m.
E stands for extension in m.
E(e) stands for elastic potential energy in J.

Question 10

What is the equation for specific heat capacity?

Answer 10

Delta E = m c delta theta.
M stands for mass in kg.
C stands for specific heat capacity in joules / kg degrees C.
Delta stands for change in.
Delta theta stands for change in temperature in degrees C.
Delta E stands for change in thermal energy in J.

Question 11

What are the equations for power?

Answer 11

P = E / t
P stands for power in Watts.
E stands for energy transferred in J.
T stands for time in seconds.

P = W / t
W stands for work done in J.

Question 12

What is the equation for density?

Answer 12

D=mV
Density is kg/m cubed or g/ cm cubed
Mass is kg or g
Volume is m cubed or cm cubed.

Question 13

What is the formula for specific latent heat?

Answer 13

E =mL
E is energy in J
M is mass in kg
L is SLH in J/kg

Question 14

What is the equation for pressure and volume?

Answer 14

pV = constant
P is pressure in Pa
V is volume in m cubed
Constant is a constant value.