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Vocabulary
Work it Out!
Forms of energy
Transformations
Heat transfer
100
Kinetic energy has to do with things in __________, while __________ energy is stored energy
What is motion What is potential
100
A 65 kg rock climber ascends a cliff. What is the climber’s gravitational potential energy at a point 35 m above the base of the cliff?
GPE = 22,295 J
100
___________ energy is a form of energy that travels through space in waves
What is electromagnetic
100
What kind of energy transformation occurs on a pool deck during a hot day. (Example: sunbathing)
What is radiant (electromagnetic) ---> thermal
100
Heat transfers from _______ to _______ objects
What is warmer to cooler
200
The amount of energy needed to raise 1kg of a substance by 1 K.
What is specific heat
200
What is the kinetic energy of a 44kg cheetah running at 31 m/s?
KE = 21142 J
200
Heat energy is also known as _______ energy
What is thermal
200
What type of energy transformation occurs when you turn on a light?
What is electrical --> electromagnetic/light/thermal
200
A type of energy transfer that does not require a medium in which to travel
What is radiation
300
The law of ___________ says that energy can neither be created nor destroyed
What is conservation of energy
300
A 68.2 kg car is sitting still at the top of a 40.0 m hill. What is the cars potential and kinetic energy?
PE = (68.2 kg) (9.8 m/s2) (40.0m)= 26734.4 J KE = 0 J (sitting still) ME = PE + KE = 26734.4 J + 0 J = 26734.4 J
300
Gasoline, fossil fuels, and food are all examples of ________ energy
What is chemical
300
Pumping fuel in your car is which type of energy information?
What is chemical ---> mechanical
300
Heat moving from a hot pot to the spoon stirring it is an example of what type of heat transfer
What is conduction
400
The average kinetic energy in an object is its _____________
What is temperature
400
If the amount of work done in a system equals 9,000 J, how much energy is being produced?
9,000 J because energy is the ability to do work. They are equal.
400
What type of energy involves the splitting of an atom?
What is nuclear energy
400
What type of energy transformation occurred when you ate dinner last night?
What is potential ---> mechanical --> chemical ---> thermal
400
Wind blowing a kite into an upward direction is an example of what type of heat transfer?
What is convection
500
The ability to do work or cause a change is called _________
What is energy
500
How much heat is required to warm 275 g of water from 76 °C to 87 °C? (specific heat of water is 4.179 J/g °C)
What is 12,641.5 J
500
The total Kinetic and Potential energies in a system is called __________ Energy.
What is Mechanical
500
Ms. Bullock says, "I created the energy in the m&m's to give to small children during halloween." Why is this statement incorrect?
What is energy cannot be created
500
Why does jumping into a cold pool make you feel cold? What transformation is occurring?
What is conduction. The heat from your body leaves and enters into the cold water.