efficiency Flashcards
1
Q
what is energy efficiency
A
the percentage of useful energy in relation to the total energy being consumed
2
Q
what’s the formula to find efficiency
A
% efficiency = useful energy/energy consumed
3
Q
what’s thermal energy
A
the energy contained in a substance (how excited the particles are)
4
Q
the greater the mass the greater the ________ _________
A
thermal energy
5
Q
what is heat
A
the transfer of thermal energy
6
Q
what is thermal energy measured in (2)
A
joules or kilojoules
7
Q
heat always goes from ______ to ______ environment
A
warmer
colder
8
Q
what does heat depend on
A
the agitation of particles and the mass of substance
9
Q
what is temperature measured in
A
degree of agitation of the particles of the substance at a given point in time
