7)When you place a metal saucepan on the heating element of a stove, heat is transferred from the element to the saucepan by:
Areflection.
Bconvection.
Cconduction.
Dradiation.
8)Which of the following can be described as being luminous :
AStreetlights (turned on)
BA road sign
CThe moon
DWater
9)In the burning of fireworks during New Year displays, chemical potential energy is converted into:
Aheat, light and sound energy.
Blight and sound energy.
Csound and heat energy.
Dgravitational potential energy and light.
10)Which would be the most appropriate description of how energy is distributed when a torch is turned on?
A70% light energy, 30% thermal energy
B70% thermal energy, 30% electrical energy
C65% light energy, 30% thermal energy
D40% thermal energy, 55% light energy
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