EASY

AS and A Level

IMPORTANT

Earn 100

The density of steel is $7850 kg m^{- 3}$ . Calculate the mass of a steel sphere of radius $0.15 m$ . (First, calculate the volume of the sphere using the formula $V = \frac{4}{3} π r^{3}$ and then use the density equation.)

Important Questions on Matter and Materials

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 3

A chair stands on four feet, each of area

10 {cm}^{2}

. The chair weighs

80 N

. Calculate the pressure it exerts on the floor.

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 4

Estimate the pressure you exert on the floor when you stand on both feet. (You could draw a rough rectangle around both your feet placed together to find the area in contact with the floor. You will also need to calculate your weight from your mass.)

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 5

Calculate the pressure due to the water on the bottom of a swimming pool if the depth of water in the pool varies between

0.8 m

and

2.4 m

. (Density of water

= 1000 kg m^{- 3}

. ) If atmospheric pressure is

1.01 \times 10^{5} Pa

, calculate the maximum total pressure at the bottom of the swimming pool. (

g = 10 m s^{- 2}

)

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 6

Estimate the height of the atmosphere if atmospheric density at the Earth's surface is

1.29 kg m^{- 3}

. (Atmospheric pressure

= 101 kPa

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 7

(a) Why is it difficult to hold an inflated plastic ball underwater?

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 7

(b) A submarine floats at rest under the water. To rise to the surface compressed air is used to push water out of its 'ballast' tanks into the sea. Why does this cause the submarine to rise?

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 8

A boat has a uniform cross-sectional area at the water line of

750 m^{2}

. Fifteen cars of average mass

1200 kg

are driven on board. Calculate the extra depth that the boat sinks in water of density

1000 kg m^{- 3}

EASY

AS and A Level

IMPORTANT

Physics for Cambridge International AS & A Level Coursebook 3rd Edition Digital Access>Chapter 7 - Matter and Materials>Questions>Q 10

A balloon of volume

3000 m^{- 3}

is filled with hydrogen of density

0.090 kg m^{- 3}

. The mass of the fabric of the balloon is

100 kg

. Calculate the greatest mass that the balloon can lift in air of density

1.2 kg m^{- 3}

The density of steel is 7850 kg m-3. Calculate the mass of a steel sphere of radius 0.15 m. (First, calculate the volume of the sphere using the formula V=43πr3 and then use the density equation.)

Important Questions on Matter and Materials

Learn and Prepare for any exam you want !

The density of steel is $7850 kg m^{- 3}$ . Calculate the mass of a steel sphere of radius $0.15 m$ . (First, calculate the volume of the sphere using the formula $V = \frac{4}{3} π r^{3}$ and then use the density equation.)