Physics EST review

A student wishes to determine the density of an irregularly-shaped stone.

First he finds the mass of the stone.

Next he lowers the stone into a measuring cylinder

containing water.

The diagrams show the measuring cylinder before and after the stone is lowered into it.

How should the student calculate the density of the stone?

• mass of stone × reading 2

• mass of stone × (reading 2 – reading 1)

• mass of stone ÷ reading 2

• mass of stone ÷ (reading 2 – reading 1)

Two cylinders are made of the same metal. Both cylinders have the same cross-sectional area

but one is longer than the other.

Which quantity is the same for both cylinders?

• density

• mass

• weight

• volume

The diagram shows a cuboid block made from a metal of density 2.5g/ cm³ .

What is the mass of the block?

• 8 g

• 16 g

• 50 g

• 100 g

The diagram represents molecules of gas moving in a container.

What happens to the gas molecules when the temperature of the gas increases?

• They move more quickly

• They move more slowly

• They vibrate more quickly

• They vibrate more slowly

The gas in a container is heated but is kept at constant volume.

Why does the gas pressure increase?

• The molecules expand

• The molecules increase in mass

• The molecules move further apart

• The molecules move more rapidly

What causes the random, zig-zag movement (Brownian motion) of smoke particles suspended in air?

• air molecules colliding with smoke particles

• convection currents as the hot smoke rises

• smoke particles colliding with each other

• smoke particles reacting with oxygen molecules in the air

A cotton sheet is ironed with a hot electric iron.

How is energy transferred through the metal base of the iron to the sheet?

• by convection only

• by conduction only

• by radiation only

• by convection and radiation only

The diagram shows a heater above a thermometer.

The thermometer bulb is in the position shown.

Which row shows how the heat energy from the heater reaches the thermometer bulb?

• A

• B

• C

• D

Which row shows the surface that is the better absorber and the surface that is the better emitter

of infra-red radiation?

• A

• B

• C

• D

The diagram shows the cross-section of a vacuum flask containing a hot liquid in a cold room.

X and Y are points on the inside surfaces of the walls of the flask.

How is thermal energy transferred between X and Y?

• by conduction and convection

• by conduction only

• by radiation and convection

• by radiation only