0654_2019_ON_QP_11_PHYSICS

The speed-time graphs represent the motion of a car moving in a straight line.

Which graph represents the car moving first with a constant acceleration, then with a larger constant acceleration and then with a constant speed?

• 
• 
• 
• 

An object has a mass of 20 kg and a density of 8400 kg/m^3.

What is the volume of the object?

• 2.4 × 10^3 m3

• 4.2 × 10^2 m3

• 1.6 × 10^5 m3

• 1.7 × 10^5 m3

An engine is doing work on a car as the car moves along a road.

Which two changes must result in less work being done on the car by the engine?

• decreasing the engine’s force on the car and decreasing the distance moved by the car

• decreasing the engine’s force on the car and increasing the distance moved by the car

• increasing the engine’s force on the car and decreasing the distance moved by the car

• increasing the engine’s force on the car and increasing the distance moved by the car

The table shows four sources of energy used to generate electricity.

Which source is shown with a statement of whether it is renewable and whether it is reliable at all times?

Answer (source, renewable, reliable at all times )

• coal, yes, no

• nuclear fission, no, yes

• tides, no, no

• wind, yes, yes

The more energetic molecules of a liquid are escaping from its surface, causing the liquid to cool.

What is happening to the liquid?

• It is boiling.

• It is condensing.

• It is evaporating.

• It is melting.

A substance is a gas when its temperature is 65 °C.

How do the boiling point and the melting point of this substance compare with 65 °C?

Answer (boiling point, melting point )

• above 65 °C above 65 °C

• above 65 °C below 65 °C

• below 65 °C above 65 °C

• below 65 °C below 65 °C

Which material is a good thermal conductor?

• aluminium

• cardboard

• rubber

• wool

There is a battery of e.m.f. V in a circuit of total resistance R.

Which pair of changes must result in a larger current in the circuit?

• decreasing V and decreasing R

• decreasing V and increasing R

• increasing V and decreasing R

• increasing V and increasing R

Which circuit has the smallest resistance?

• 
• 
• 
• 

Which row shows how lamps are connected in a lighting circuit in a house and gives an advantage of connecting them in this way

Answer (how lamps are connected, advantage of connecting them in this way )

• in parallel, they can be switched separately

• in parallel, they share the voltage

• in series, they can be switched separately

• in series, they share the voltage