Physics Midterm Test

Which of the following physical quantities affect the saturated vapour pressure of liquid?

• Temperature

• Volume

• Mass

• Density

A boy cycles continuously through a distance of 1.0km in 5 minutes. Calculate his average speed.

• 0.3ms-1

• 3.3ms-1

• 16.6ms-1

• 20.0ms-1

A machine has an efficiency of 60%. If the machine is required to overcome a load of 30N with a force of 20N, calculate its mechanical advantage.

• 0.7

• 0.9

• 1.5

• 2.5

A device that converts mechanical energy into electrical energy is ---------

• A dynamo

• An electric motor

• An induction coil

• A transformer

Which of the following pair of physics quantities is made up of vector?

• Speed and displacement

• Mass and force

• Displacement and acceleration

• Momentum and length

Heat transfer by conduction is similar to wave motion because ------------

• There is an increase in temperature

• Transfer of material is involved

• Charged particles vibrate at right angles

• No transfer of material is involved

When salt is dissolved in water, the freezing point of the water -----------

• Increase

• Decrease

• Remain the same

• Increase and later decrease

The magnitude of the expansion or contraction of a substance depends on the -----------

• Temperature

• Nature of the substance

• Size of the substance

• All of the statements above are correct

Which of the following thermometer is used for the calibration of other thermometer?

• Liquid-in-glass thermometer

• Constant volume gas thermometer

• Optical pyrometer

• Thermocouple

The volume of a given mass of gas at 27°C and 800mmHg is 76cm³. Calculate its volume at s.t.p.

• 100.0cm³

• 72.8cm³

• 60.0cm³

• 36.4cm³