What kind of energy does a roller coaster have at the top of a hill?
gravitational potential
100
A light bulb converts electrical energy to ________ energy.
electromagnetic
100
Heat ALWAYS flows from _______ to ______.
hot to cold
100
Materials with low specific heats are good ____________.
conductors
100
The rate at which velocity changes is known as
acceleration
200
Which of the following stores chemical energy?
a. lightning
b. a microwave
c. an apple
d. light
c. apple
200
When natural gas heats water the energy transformation goes from ____________ to ____________.
chemical to thermal
200
The transfer of energy by electromagnetic waves is called
radiation.
200
Which of the following have the highest specific heat?
a. sand
b. water
c. aluminum
d. iron
water
200
If you know the amount of the unbalanced force acting upon an object and the object's mass, using Newton's 2nd law what can you calculate?
acceleration
300
Visible light is an example of which type of energy?
electromagnetic
300
When you rub your hands together on a cold day you convert ____________ energy to ______________ energy.
mechanical to thermal
300
Ms. Gibby's coffee has a temperature of 80*C. What is the coffee's temperature in Kelvins?
353 K
300
Materials with high specific heats are known as _______.
insulators
300
A rocket launching into space demonstrates Newton's ____ Law of motion.
3rd----action/reaction
400
Energy stored in the nucleus of an atom is called
nuclear energy
400
When fossil fuels are burned, __________ energy is converted into ____________ energy.
chemical to thermal
400
Heat is transferred from the heating element on the stove to a pot of water through
conduction
400
How much heat is lost when 10 g piece of aluminum foil cools 50*C to 10*C? The specific heat of aluminum foil is 0.21 J/g*C.
-84 J
400
What is the acceleration of a car that goes from 20 m/s to rest in 10 seconds?
-2 m/s2
500
The total potential and kinetic energy of the particles in an object is called
mechanical energy
500
To satisfy the law of conservation of energy in the scenario below how much kinetic energy should there be?
chemical energy (40,000 J) --> kinetic energy (? J) + thermal energy (25,000J)
15,000 J
500
The more particles a substance has at a given temperature, the more _________________ it has.
thermal energy
500
Calculate the heat required to raise 0.7 kg of sand from 20*C to 80*C. The specific heat of sand is 0.08 J/kg*C.
3.36 J
500
What is the mechanical advantage of a lever with an effort distance arm of 10 m and a resistance distance arm of 2 m?