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.
Which of the following statements about boiling and evaporation at atmospheric pressure is correct?
evaporation and boiling of water take place at 100o
evaporation of water takes place at a temperature greater than 100oC, while boiling takes place at 100oC
evaporation of water takes place at 100oC while boiling takes place at a higher temperature
boiling takes place at 100o while evaporation my take place at temperatures lower than 100oC
Correct answer is D
No explanation has been provided for this answer.
The energy required to change a solid to liquid at constant temperature is called
thermal capacity
has lower specific heat capacity
latent heat of fusion
latent heat of vaporisation
Correct answer is C
No explanation has been provided for this answer.
0.119oC
0.840oC
1.190oC
8.400oC
Correct answer is A
mgh = mc\(\theta\)
\(\theta = \frac{gh}{c} = \frac{10 \times 50}{4200}\)
= 0.119oC
1100Jkg-1K-1
320Jkg-1K-1
200Jkg-1K-1
176Jkg-1K-1
Correct answer is B
pt = mc\(\theta\)
C = \(\frac{pt}{m \theta}\)
= \(\frac{400 \times 1}{0.5 \times 2.5}\)
= 320Jkg-1K-1
ms\(\theta\) = mv-1
ms = C
ms = s\(\theta\)
ms = c\(\theta\)
Correct answer is B
Q = ms\(\theta\) = c \(\theta\)
ms = C