3E EOY MCQ Revision 1

The diagram shows a vernier scale.

What reading is shown?

• 5.12 cm

• 5.21 cm

• 5.23 cm

• 5.32 cm

The graph below shows how the speed of an object changes with time, from the instant it is thrown vertically upward till it reaches its maximum height.

What is the maximum height reached by the object?

• 20 m

• 40 m

• 80 m

• 160 m

A small submarine of mass 1000 kg sinks in water with a uniform speed of 2 m/s.

What is the resultant force exerted on the submarine as it sinks?

• 0 N

• 500 N downwards

• 2000 N downwards

• 10000 N downwards

Which apparatus are required to determine the density of a liquid?

• Beam balance and thermometer

• Beam balance and measuring cylinder

• Metre rule and thermometer

• Metre rule and measuring cylinder

Which of the following statements are true?

1 The centre of gravity of a triangular lamina is at one of its vertices.

2 The centre of gravity of a thin uniform rod is halfway along the rod.

3 The centre of gravity of any lamina is at a point on the lamina such that the lamina can be balanced at that point.

4 The centre of gravity of a uniform rectangular lamina is at the point of intersection of its diagonals.

• 1, 4

• 1, 2, 4

• 2, 3

• 2, 3, 4

Which object A, B, C or D exerts the greatest pressure on the ground?

• A

• B

• C

• D

The diagram below represents a hydroelectric power station that generates electricity.

At which position, A, B, C or D, is the kinetic energy of the water greatest?

• A

• B

• C

• D

Which of the following increases when a liquid is boiling?

• The average kinetic energy of the molecules

• The molecular size

• The molecular spacing

• The total number of molecules

Four beakers containing the same amount of water at the same initial temperature are placed on four hot metal plates A, B, C and D. The plates are of the same size but are made from four different metals. The lower surfaces of the metal plates are kept at the same temperature with identical heat source.

• A

• B

• C

• D

A student carries out an experiment to find the melting point of wax. The graph shows how the temperature of the wax changes as it cools.

Which statement is correct?

• At X, the temperature drops more slowly than at Z.

• At Y, thermal energy is being given out by the wax.

• At Y, all the wax is solid.

• At Z, the wax molecules are not moving.