0654_2019__ON_QP_22_Phys

28. What cannot be changed by a force acting on a body?

• the mass of the body

• the motion of the body

• the shape of the body

• the size of the body

29. Diagram 1 shows a spring with its length indicated. Diagram 2 shows the same spring with a 20 N

load hung from it, and the new length of the spring.

The spring obeys Hooke’s Law.

Which graph is the extension-load graph for the spring?

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30. A force acts on an object and moves it a certain distance in the direction of the force.

The force is now doubled and the distance increases by a factor of 3.

What happens to the work done by the force on the object?

• It increases by a factor of 1.5.

• It doubles.

• It increases by a factor of 3.

• It increases by a factor of 6.

31. Which statement about evaporation of a liquid is correct?

• Evaporation causes heating of the liquid.

• Evaporation has no effect on the temperature of the liquid.

• Evaporation is the result of the less-energetic molecules escaping from the surface of the

  liquid.

• Evaporation occurs more quickly if the surface area of the liquid is increased.

32. Which statement describes the conduction of thermal energy through a metal bar?

• Atoms at the hot end move to the cold end.

• Atoms at the hot end vibrate and hit atoms at the cold end.

• Free electrons move from the hot end and collide with atoms further along the rod.

• Free electrons vibrate and pass energy on to their neighbours.

33. An experiment is set up to investigate the motion of particles floating on water in a tank. A wave

passes along the water surface from left to right.

What happens to the floating particles?

• They do not move.

• They move up and down.

• They move only to the left.

• They move only to the right.

34. A glass block is surrounded by air.

Light travelling in the glass block reaches the edge of the block.

The critical angle of the glass is 42°.

Which row shows an angle of incidence i of the light and what happens to the light when it

reaches the edge of the glass block at this angle of incidence?

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35. Which row gives the properties of a sound wave that affect the pitch and the loudness of a

sound?

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36. A wire of a certain length has a resistance of 8.0 Ω. A second wire made of the same material has

double the length and double the cross-sectional area of the first wire.

What is the resistance of the second wire?

• 4.0 Ω

• 8.0 Ω

• 16 Ω

• 32 Ω

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?

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