energy stores and transfers Flashcards
(12 cards)
what is system
an object or group of objects
what is internal energy
the total kinetic and potential energy of all the particles that make up a system
what does heating the energy store in a system do to particles
increases the energy of the particles within it
as the energy increases, what happened to the temperature
temperature increases
if the temperature increases, what does the increase depend on
-mass of substance heated
-what the substance is
-energy input
what is specific heat capacity
amount of energy required to raise the temperature of 1kg by 1degrees Celsius
state the unit for specific heat capacity
J/Kg degrees Celsius
what is the definition of power
rate at which work is done
what is the unit of power
Watt (W)
Explain why a bungee jumper slows down once the cord begins to stretch
-kinetic energy decreases and velocity decreases because they’re directly proportional
give 2 explains of chemical energy stores
-fuel
-batteries
what is meant by reproducible
another person could follow your method and get the same answer.
-shows results are valid
