0654_2017_MJ_QP_22_Phys

28.The diagram is a speed-time graph for a moving object.

What is the distance traveled by the object in 4.0 s?

• 30 m

• 40 m

• 50 m

• 80 m

29.On Earth an astronaut has a mass of 80 kg and weighs 800 N.

In deep space the gravitational field is very weak.

What is the mass and what is the weight of the astronaut in deep space?

• 
• 
• 
• 

30.A spring of unstretched length 5.0 cm has a spring constant k of 20 N / cm. A load is suspended

from the spring and its new length is 8.5 cm.

What is the weight of the load?

• 0.70 N

• 1.7 N

• 70 N

• 170 N

31.A body of mass m moving with speed v has kinetic energy E.
A second body, also of mass m, moves with speed $\frac{V}{2}$ .
What is the kinetic energy of the second body? 

•  $\frac{E}{4}$  

•  $\frac{E}{2}$  

•  $E$  

•  $2E$  

32.A gas is trapped in a sealed container of constant volume.

The gas molecules collide with the container walls to produce a pressure.

The temperature of the gas increases. This causes the pressure of the gas to increase.

Which row explains why the pressure increases, in terms of the gas molecules?

• 
• 
• 
• 

33.Gardeners protect plants from low temperatures by leaving them in a greenhouse with large

containers of water.

During the day the water temperature increases very little and at night it decreases very little.

Which property explains why this change in temperature is very small?

• The water has a high thermal capacity.

• The water has a low thermal capacity.

• Water is a good thermal conductor.

• Water is a poor thermal conductor.

34.Bread can be cooked by placing it below a heating element.

Which process transfers thermal energy from the heating element to the bread?

• conduction

• convection

• evaporation

• radiation

35.The diagram shows a ray of light in air entering and passing through a glass block.

Which labelled arrow shows the direction of the ray after it leaves the glass block?

• A

• B

• C

• D

36.Astronaut 1 uses a hammer to mend a satellite in space. Astronaut 2 is nearby. There is no air in

space.

What does astronaut 2 hear compared with the sound heard if they were working on Earth?

• a louder sound

• a quieter sound

• a sound of the same loudness

• no sound at all

37.There is a current I in a resistor.

• $Q=\frac{I}{t}$

• $Q=I\times t$

• $Q=I+t$

• $Q=I-t$