The pressure exerted by a given mass of gas in a container
decreases if the container is heated
increases if the molecules of the gas move faster
increases if the container is doubled
decreases as the kinetic energy of the gas molecules inceases
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements is correct?
the density of a liquid decreases when it expands
the density of a liquid increases when the liquids are heated
the real expansivity of a liquid is less than its apparent expansivity
a liquid changes to solid when heated to a sufficiently high temperature
Correct answer is A
No explanation has been provided for this answer.
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