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.
The temperature of a liquid falls after some of it has evaporated because
the liquid left is smaller in volume and the breeze easily cools it
the more energetic molecules have escaped into the atmosphere
the liquid left has less latent heat
after evaporation impurities are left behind
Correct answer is B
No explanation has been provided for this answer.
3.0 x 10-1 kg
3.0 x 10-2 kg
3.0 x 10-3 kg
3.0 x 10-4 kg
Correct answer is B
M = \(\frac{Q}{T} = \frac{6.9 \times 10^{4}}{2.3 \times 10^6} = 3 \times 10^{-2} kg\)
heat capacity of ice
specific heat capacity
specific latent heat of vaporisation of ice
specific latent heat of fusion of ice
Correct answer is D
No explanation has been provided for this answer.
120s
570s
600s
836s
Correct answer is B
t = \(\frac{mc\theta}{IV} = \frac{3 \times 4189 \times 60}{6 \times 120} = 570s\)
The silvered surface in a vacuum flask reduces heat loos due to
conduction
convection
radiation
evaporation
Correct answer is C
No explanation has been provided for this answer.