0654_2015_ON_QP_13_Phys

28.The following are distance / time graphs.

Which graph shows an object moving at constant speed?

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29.Which statement about weight is correct?

• Weight and mass are both measured in the same unit.

• Weight is the amount of matter in a body and is measured in kilograms.

• Weight is a force and is measured in kilograms.

• Weight is a force and is measured in newtons.

30.A student pours liquid into a measuring cylinder.

The student records the volume of the liquid from the scale on the measuring cylinder. He then

puts the measuring cylinder containing the liquid on a balance and records the mass.

What else needs to be measured before the density of the liquid can be calculated?

• the depth of the liquid in the measuring cylinder

• the mass of the empty measuring cylinder

• the temperature of the liquid in the measuring cylinder

• the volume of the empty measuring cylinder

31.An electric motor is used to lift a container off a ship.

The output power of the motor is changed by changing the time taken to lift the container and by

changing the work done in lifting the container.

Which row shows changes that both increase the output power?

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32.On a warm day, a swimmer climbs out of a swimming pool into the open air and water evaporates

from his skin.

As the water evaporates, which molecules escape into the air first and what happens to the

average speed of the remaining water molecules?

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33.A sample of a solid is heated for 12 minutes and its temperature noted every minute.

The results are shown in the table.

• all solid

• in the process of melting

• all liquid

• in the process of boiling

34.Food is kept in a loosely-packed cool-box which uses two ice packs to keep it cool.

Where should the ice packs be placed to keep all the food as cool as possible?

• both at the bottom of the box

• both at the top of the box

• one at the front and one at the back of the box

• one on the left and one on the right of the box

35.The diagram shows a wave.

What are the amplitude and the wavelength of this wave?

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36.An underwater lamp is used to light a swimming pool.

Rays of light from the lamp hit the water surface at different angles, as shown in the diagram.

Which ray hits the surface at the critical angle?

• A

• B

• C

• D

37.In a test, a car horn is found to be too loud and the pitch of the note is too high.

What information does this give about the amplitude and the frequency of the sound wave

produced?

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