0654_2019__ON_QP_12_Phys

28. Four solid cuboid blocks P, Q, R and S have the dimensions shown in the diagram and masses

that are equal.

Which two blocks have the same density?

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29. 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

30. Four cars travel up the same hill. They have different masses and take different times to travel up

the hill.

Which car is supplying the most useful power?

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31. A ball is dropped from rest and falls.

Which row describes the kinetic energy and the gravitational potential energy of the ball

immediately after it is released?

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32. 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?

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33. A room is heated using an electric heater placed on the floor.

What is the name of the process by which the heated air moves around the room?

• conduction

• convection

• evaporation

• radiation

34. A student looks at her image in a vertical plane mirror.

Which row describes the size of the image and its position?

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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. There is a current of 4.0 A in a resistor and a potential difference (p.d.) of 12 V across it.

What is the resistance of the resistor?

• 0.33 Ω

• 3.0 Ω

• 8.0 Ω

• 48 Ω

37.A 1.0 Ω resistor, a 3.0 Ω resistor, and a 6.0 Ω resistor are connected in series.

What is the combined resistance of this combination?

• 4.0 Ω

• 7.0 Ω

• 10 Ω

• 18 Ω