Energy Equations Flashcards
1
Q
what does each symbol mean in the equation Ee= 1/2 ke² including any relevant units
A
- Ee- elastic potential energy
- k- spring constant in N/m
- e- extension in m
2
Q
what does each symbol mean in the equation △E= mc△θ including any relevant units
A
- △E- change in thermal energy
- m- mass in kg
- c- specific heat capacity in J/kg°C
- △θ- temperature change
3
Q
what is specific heat capacity?
A
the energy required to raise one kilogram (kg) of the material by one degree Celsius (°C)
4
Q
define power
A
the rate at which energy is transferred or the rate at which work is done
5
Q
what is a watt?
A
energy transfer of 1 joule per second
6
Q
how can two systems transferring the same amount of energy differ in power output due to time taken?
A
even when transferring the same amount of energy, the longer the time it takes to transfer this energy, the less power is output and the faster the energy is transferred, the more power is output
