Ibn Sina Final Semester Examination 2020 - Set A

100 cm³ of olive oil needs 8 minutes to increase the temperature by 50°C and 100 cm³ of water needs 10 minutes to increase the temperature by 50°C when heated with the same heater. Which statement explains this situation?

• The density of olive oil is lower than the density of water

• The mass of olive oil is smaller than the mass of water

• The specific latent heat of olive oil is lower than the specific latent heat of water

• The specific heat capacity of olive oil is lower than the specific heat capacity of water

Diagram above shows a syringe connected to a Bourdon gauge. The reading on Bourdon gauge is 1.2 × 10⁵ Pa when the volume of air in the syringe is 20 cm³ . What is the new volume of air when the reading of Bourdon gauge is at 1.6 × 10⁵ Pa?

• 10 cm³

• 15 cm³

• 25 cm³

• 30 cm³

Diagram above shows a balloon at room temperature 30°C. The balloon is then put in a refrigerator with temperature 5° C. Which of the following graph shows the correct relationship between the volume and the temperature of gas?

• 
• 
• 
• 

Which phenomenon shows the application of latent heat of vaporisation in everyday life?

• Steaming chicken

• Cooling a car engine with water

• Cooling down a drink with ice

• Freezing prawns in ice cubes

The diagram represents the molecules of a gas in a closed container of constant volume. What happens to the molecules when the gas is heated?

• They expand.

• They hit the walls less often.

• They move further apart.

• They move more quickly.

A student carries out an experiment to find the melting point of wax. The graph shows how the temperature of the wax changes as it cools. Which statement is correct?

• At X the temperature drops more slowly than at Z.

• At Y all the wax is solid.

• At Y thermal energy is being given out by the wax.

• At Z the wax molecules are not moving.

Hot liquid in a vacuum flask cools extremely slowly. This is because some methods of heat transfer cannot take place in a vacuum.

Which methods cannot take place in a vacuum?

• Conduction and convection only

• Conduction and radiation only

• Convection and radiation only

• Conduction, convection and radiation

A heater supplies 80 J of energy to a block of metal. The temperature of the block rises by 20 °C.

What happens to the block of metal when its temperature falls by 10 °C?

• Its internal energy decreases by 40 J.

• Its internal energy decreases by 160 J.

• Its internal energy increases by 40 J.

• Its internal energy increases by 160 J.

The diagram shows a mercury manometer used to measure the pressure of gas in a container. Atmospheric pressure is 76 cm of mercury. What is the pressure of the gas?

• 56 cm of mercury

• 68 cm of mercury

• 84 cm of mercury

• 96 cm of mercury

An engineer wants to fix a steel washer on to a steel rod. The rod is just too big to fit into the hole of the washer. How can the engineer fit the washer on to the rod?

• Cool the washer and put it over the rod.

• Cool the washer and rod to the same temperature and push them together.

• Heat the rod and then place it in the hole.

• Heat the washer and then place it over the rod.