Energy is measured using a unit called the:
The energy of a moving object is called:
gravitational potential energy.
elastic potential energy.
Jordan watches a music video clip on his iPhone. Choose the best description of the energy transformations that are happening. A
electrical energy sound energy + light energy + heat energy B
electrical energy sound energy + light energy
sound energy + light energy + heat energy electrical energy D
sound energy + light energy electrical energy
A particular electric knife is 40% efficient. If 100 J of energy is supplied to the knife, the number of joules that is then transformed into kinetic energy is: A
Select which device transforms chemical energy into kinetic energy. A
a battery operated car
an electric knife
Select the correct energy flow diagram showing energy changes that occur when operating a battery-operated fire truck that moves and sounds a siren. A
electrical energy chemical energy + sound energy
chemical energy sound + heat energy
electrical energy heat + elastic potential energy
chemical energy kinetic energy + sound + heat
A red Honda travels at 20 km/h around a curved road near the top of a mountain. A blue Honda travels at 50 km/h along a flat road near a beach. a
State which car has the greatest kinetic energy.
State which car has the greatest gravitational potential energy.
Explain your answers above.
List one useful forms of energy that are produced when you use an electric drill.
Identify two other forms of energy that are produced that are not useful.
The table below lists the specific thermal capabilities of a number of materials. This unit is the number of joules of energy that is needed to raise the temperature of 1 kg of this substance by 1° Celsius.
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