topic 1: energy (energy changes in a system) Flashcards
1
Q
what is specific heat capacity?
A
the amount of energy required to raise the temperature of 1kg of a substance by 1•c
2
Q
what is elastic potential energy?
A
energy stored in a stretched object
3
Q
what is the equation for elastic potential energy?
A
Ep = 1/2 ke ²
4
Q
what is kinetic energy?
A
energy due to motion
5
Q
what is the equation for kinetic energy?
A
Ek = 1/2 mv ²
6
Q
what is a system?
A
an object or a group of objects
7
Q
what is gravitational potential energy?
A
energy stored in an object due to its position in a gravitational field
8
Q
what is the equation for gravitational potential energy?
A
Ep = mgh
9
Q
what is thermal energy?
A
energy due to heat
10
Q
what is power?
A
rate of energy transfer
11
Q
what is the equation for power?
A
P = E ÷ t
(power = energy ÷ time)
