Flinders Island

Topics: Energy, Potential energy, Kinetic energy Pages: 3 (439 words) Published: October 7, 2013
 1
Energy is measured using a unit called the:
Akilogram.
Bmetre.
Csecond.
Djoule.
2
The energy of a moving object is called:
Anuclear energy.
Bgravitational potential energy.
Celastic potential energy.
Dkinetic energy.
3
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
4
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
B100
C60
D140
5
Select which device transforms chemical energy into kinetic energy. Aa torch
Ba battery operated car
Ca kettle
Dan electric knife
6
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
7
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.

8
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.

9
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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