equations

Question 1

kinetic energy

Answer 1

1/2 x mass x velocity^2

Question 2

units for kinetic energy equation?

Answer 2

Kinetic energy = joules
mass = kg
velocity = m/s

Question 3

Elastic potential energy

Answer 3

1/2 x spring constant x extension^2

Question 4

units for elastic potential energy equation?

Answer 4

elastic potential energy = Joules
spring constant = N/m
extension = m

Question 5

Gravitational potential energy

Answer 5

mass x gfs x height

Question 6

units for gravitational potential energy equation?

Answer 6

GPE = Joules 
Mass = kg 
GFS = 9.8 N/kg
height = m

Question 7

Change in thermal energy

Answer 7

mass x specific heat capacity x change in temp

Question 8

units for change in thermal energy equation?

Answer 8

change in thermal energy = Joules
mass = kg
SPC = joules / kg (in degrees C)
Change in temp = degrees C

Question 9

power (1)

Answer 9

energy transferred / time

Question 10

units for power (1) equation?

Answer 10

power = watts
energy transferred = joules
time = seconds

Question 11

power (2)

Answer 11

work done / time

Question 12

units for power (2) equation?

Answer 12

power = watts
work done = joules
time = seconds

Question 13

efficiency (1)

Answer 13

useful energy out / useful energy in (expressed as % or decimal)

Question 14

efficiency (2)

Answer 14

useful power out / total power in ( expressed as % or decimal)

Question 15

charge

Answer 15

current x time

Question 16

units for charge equation?

Answer 16

charge = coulombs
current = amps 
time = seconds

Question 17

potential differnece

Answer 17

current x resistance

Question 18

units for PD equation?

Answer 18

PD = volts 
current = amps 
resistance = ohms

Question 19

power (3)

Answer 19

potential difference x current

Question 20

units for power (3) equation?

Answer 20

power = watts 
PD = volts 
current = amps

Question 21

power (4)

Answer 21

current^2 x resistance

Question 22

units for power (4) equation?

Answer 22

power = watts 
current = amps
resistance = ohms

Question 23

energy (1)

Answer 23

power x time

Question 24

units for energy (1) equation?

Answer 24

energy = joules
power = watts
time = seconds

Question 25

energy (2)

Answer 25

charge x potential difference

Question 26

units for energy (2) equation?

Answer 26

energy = joules
charge = coulombs
PD = volts

Question 27

density

Answer 27

mass / volume

Question 28

units for density equation?

Answer 28

density = kg/m^3
mass = kg
volume = m^3

Question 29

specific heat capacity

Answer 29

change in energy = mass x specific heat capacity x change in temperature

Question 30

units for specific heat capacity equation?

Answer 30

change in energy = joules
mass = kg
SHC = j/kg degrees C
change in temp = degrees C

Question 31

specific latent heat

Answer 31

energy = mass x SLH

Question 32

units for specific latent heat equation?

Answer 32

energy = joules
mass = kg 
SLH = joules/kg

Question 33

Pressure

Answer 33

volume x constant

Question 34

units for pressure equation?

Answer 34

pressure = pascals
volume = m^3
given the constant