Equations

Question 1

Which equation links kinetic energy, mass, and speed?

Answer 1

Kinetic energy= 1/2 * mass * speed^2
Kinetic energy= J
Mass=kg
Speed= m/s

Question 2

Which equation links elastic potential energy, the spring constant, and extension?

Answer 2

Elastic potential energy= 1/2 * spring constant * extension^2
Elastic potential energy=J
Spring constant=N/m
Extension=m

Question 3

Which equation links gravitational potential energy, mass, gravitational field strength, and height?

Answer 3

GPE= mass * gravitational field strength * height
GPE= J
Mass=kg
Gravitational field strength= N/kg
Height= m

Question 4

Which equation links power, work done, and time taken?

Answer 4

power= work done/time taken
power=Watts (W)
work done= J
time taken=s

Question 5

Which equation links power, energy transferred and time taken

Answer 5

power = energy transferred/ time taken
power=Watts (W)
energy= J
time= s

Question 6

What are the two efficiency equation?

Answer 6

efficiency= useful energy output/ total energy output
efficiency= useful power output/ total power output
power= W
energy= J

Question 7

Which equation links change in thermal energy, mass, specific heat capacity and temperature change?

Answer 7

change in thermal energy= mass * specific heat capacity * temperature change
thermal energy= J
mass= kg
specific heat capacity= J/kg°C
temperature change=°C

Question 8

Which equation links charge flow, current and time?

Answer 8

charge flow= current * time
charge = Coulombs
current= Amps
time= s

Question 9

Which equation links potential difference, current and resistance?

Answer 9

potential difference= current * resistance
potential difference= Volts
current = Amps
resistance = Ohm

Question 10

Which equation links power, current and potential difference?

Answer 10

power= current * potential difference
power = Watts
current = Amps
potential difference = Volts

Question 11

Which equation links power, current and resistance ?

Answer 11

power = current^2 * resistance
power = Watts
current=Amps
resistance = Ohms

Question 12

Which equation links energy transferred, power and time?

Answer 12

energy transferred = power * time
energy transferred = J
power = W
time = s

Question 12

Which equation links energy transferred, charge flow and potential difference?

Answer 12

energy transferred= charge flow * potential difference
energy transferred = J
charge flow = Coulombs
potential difference = Volts

Question 13

Which equation links density, mass and volume?

Answer 13

density = mass/volume
density=g/cm^3 or kg/m^3
mass= kg or g
volume= cm^3 or m^3

Question 14

Which equation links thermal energy, specific latent heat and mass

Answer 14

thermal energy = mass * specific latent heat
thermal energy = J
mass = kg
specific latent heat = J/kg

Question 15

Which equation links wave speed, frequency, and wavelength?

Answer 15

wave speed = frequency * wavelength
wase speed = m/s
frequency=Hz
wavelength=m

Question 16

Which equation links time period and frequency?

Answer 16

time period = 1/frequency
time = s
frequency =Hz

Question 17

What is the magnification equation?

Answer 17

magnification = image height / object height
height= cm