Physics Past Questions and Answers

The change of state from solid to liquid occurs

A At constant temperature
B When temperature is lower than the boiling point
C When temperature is just near freezing point
D When temperature is equal to the boiling point

Question 3797:

Which of the following types of thermometers can be used to measure a range of temperature from -50°C to 50°? i. Clinical ii. Mercury iii. Alcohol-in-glass

A I only
B Ii only
C Iii only
D I and ii only

Question 3798:

A body of mass M kg rests on a plane inclined at an angle \(\theta\) to the horizontal. The component of the weight of the body parallel to the plane is

A Mg sin \(\theta\)
B Mg cos \(\theta\)
C Mg tan \(\theta\)
D Mg sec \(\theta\)

Question 3799:

A quantity of water at 20oC is mixed with another quantity of water at 70oC. The final steady temperature of the mixture is 40oC. Determine the ratio of the mass of the cold water to that of the hot water

A 7:2
B 3:2
C 2:5
D 1:2

Question 3800:

The mass of an empty density bottle is 30g. When filled with a liquid, the mass reduces to 38g. Calculate the apparent cubic expansivity of the liquid

A 6.25 x 10K-1
B 6.25 x 10-3K-1
C 2.50 x 10-3K-1
D 2.50 x 10-4K-1