Physics Questions and Answers
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
900 JK-1
90 JK-1
100 JK-1
200 JK-1
Correct answer is A
Heat supplied = Heat gained Pt = MCDθ
30 x 5 x 60 = c x 10
where c = mc which is the heat capacity
c = (30 x 5 x60)/10 = 900 JKg-1
The phenomenon that shows that increase in pressure lowers the melting point can be observed in
sublimation
condensation
coagulation
regelation
Correct answer is D
Regelation means refreezing a phenomenon whereby melted ice free from increased pressure refreezed when they are released from the pressure.
30 s
10 s
12 s
15 s
Correct answer is D
V = X/t
330 = ( 4.95 x 10^3)/t
t = (4.95 x 10^3/330 =
= 15 secs
The ground is always cold at night because the
atmosphere absorbs the sun's energy at night
earth radiates heat to the atmosphere at night
sun no longer shine at night
atmosphere reflects the sun's energy at night
Correct answer is B
The earth radiate heat to the atmosphere at night thereby lowering the temperature of the ground
A perfect emitter or absorber of radiant energy is a
conductor
black body
white body
red body
Correct answer is B
Dull, black surface are good emitters or absorbers of energy