0654_2019__ON_QP_11_Phys

28. 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?

• 
• 
• 
• 

29. An object has a mass of 20 kg and a density of 8400 kg / m³.

What is the volume of the object?

• 2.4 × 10^–3

  m³

• 4.2 × 10²

  m³

• 1.6 × 10⁵

  m³

• 1.7 × 10⁵

  m³

30. 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

31. 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?

• 
• 
• 
• 

32. 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.

33. 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?

• 
• 
• 
• 

34. Which material is a good thermal conductor?

• aluminium

• cardboard

• rubber

• wool

35. 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

36. Which circuit has the smallest resistance?

• 
• 
• 
• 

37. Which row shows how lamps are connected in a lighting circuit in a house and gives an

advantage of connecting them in this way?

• 
• 
• 
•