Kinetic and potential energy
What are the variables gravitational potential energy depends on?
Mass, Gravitational Acceleration, and Height
As a ball falls, its _____ energy turns into _____ energy. (Order matters)
Gravitational Potential, Kinetic
What is heat capacity in your own words?
The amount of energy it takes to warm a gram of a material by 1 degree.
In a magnetic field lines move OUT of _____ poles
North
If heat flowed from ice to boiling water, which law of thermodynamics would that violate?
2nd
If we multiply the velocity of an object by 3, what happens to its kinetic energy?
It is multiplied by 9
Write the law of conservation of energy
Energy is never created or destroyed, only changes forms.
How do you convert between celcius and Kelvin
to go from celcius to kelvin, add 273˚
What happens to a magnet when it is broken in half?
2 new poles, one north and one south, are created.
Which law of thermodynamics helps up preserve food and slow chemical reactions?
3rd
What does the K in elastic potential energy stand for? What are the units?
Spring constant, N/m
As a ball is thrown straight upwards, at what point will it have 0 kinetic energy? Why?
The top of its path, because it stops for a moment when it is not moving upwards or downwards.
What is phase change heat (or Latent heat)
The amount of energy it takes to change the state of matter of a material.
List all 7 types of electromagnetic radiation IN ORDER
Radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma
If a system contains 200 J of energy and we do 90 J of work on it and remove 40 J of heat from the system, what is its new energy?
250 J
If we move an object from earth to jupiter, would its gravitational potential energy increase or decrease? WHY?
Increase, because jupiters gravity is stronger.
How fast will a ball be moving if it started at rest and rolls down a 25 m ramp.
22.14 m/s
If the latent heat of ice is 330 J/g, how much energy will it take to melt 150 g of ice?
49,500 J
Which has a higher frequency, infrared or ultraviolet waves?
Ultraviolet
What is temperature?
The average kinetic energy (velocity) of molecules in a substance
What is the energy stored in a 0.2 m spring when it is stretched to a length of 0.5 m. It has a spring constant of 2000 N/m
90 J
If we push a 2 kg ball on a spring (k=200 N/m) down to compress it 1.5 meters, what will be its maximum velocity and its maximum height?
13.9 m/s, and 9.97 m
If we pour 200 g of 30˚C water into a 400˚C aluminum pot which has a mass of 800 g, what temperature will they reach equilibrium at?
(Water has a specific heat of 4 and aluminum has a specific heat of 0.25)
104˚ C