Flinders Island

Topics: Energy, Potential energy, Kinetic energy Pages: 3 (439 words) Published: October 7, 2013
Energy is measured using a unit called the:
The energy of a moving object is called:
Anuclear energy.
Bgravitational potential energy.
Celastic potential energy.
Dkinetic energy.
Jordan watches a music video clip on his iPhone. Choose the best description of the energy transformations that are happening. Aelectrical energy  sound energy + light energy + heat energy Belectrical energy  sound energy + light energy

Csound energy + light energy + heat energy  electrical energy Dsound 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: A40
Select which device transforms chemical energy into kinetic energy. Aa torch
Ba battery operated car
Ca kettle
Dan 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. Aelectrical energy  chemical energy + sound energy

Bchemical energy  sound + heat energy
Celectrical energy  heat + elastic potential energy
Dchemical 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. aState which car has the greatest kinetic energy.

bState which car has the greatest gravitational potential energy.

cExplain your answers above.

aList one useful forms of energy that are produced when you use an electric drill.

bIdentify 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.

If each...
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