Application of Energy Flashcards
How to calculate kinetic energy?
kinetic energy = 0.5 mass x velocity
How to calculate gravitational potential energy?
gravitational potential = mass x gravitational field strength x height
How to calculate elastic potential?
Elastic potential = 0.5 x spring constant x extension^2
What is the law of conservation of energy?
Energy cannot be created or destroyed, therefore it can only be transformed from one form to another.
What is another way of describing energy transfer?
Work done.
What is specific heat capacity?
The amount of energy needed to raise the temperature of 1kg of a material by 1 degrees.
What is the equation for specific heat capacity?
Energy = mass x specific heat capacity x change in temp
What is efficiency?
Useful energy/power output / total energy/power input x 100%
How to increase efficiency?
insulate or streamline/lubricate to reduce friction.
How to find out what metal has the better thermal conductivity?
Whichever rod of metal gets hottest first is the best conductor therefore it heats the quickest and has a higher thermal conductivity.
