CP3 Energy Flashcards
1
Q
What is energy measured in?
A
joules
2
Q
What type of energy is stored in a moving object?
A
kinetic energy
3
Q
What is it called when energy is transferred by a force?
A
mechanically
4
Q
What happens to the kinetic energy of a car when it brakes?
A
thermal turns into the surroundings
5
Q
What is conservation of energy?
A
energy cannot be created or destroyed
6
Q
What type of energy is stored in foods, batteries and fuels?
A
chemical energy
7
Q
What does it mean if energy is wasted?
A
turns into an energy we don’t need
8
Q
What would it mean if a kettle had a very high efficiency?
A
boils the water faster
9
Q
What does it mean if a light bulb has a very low efficiency?
A
most of the energy is being wasted
10
Q
What does effeciency mean?
A
how much energy is wasted and how much energy is useful
