Temperature

Which of the following can be used to measure temperature

1 expansion of gas

2 change in resistance

3 change in mass

• 1 only

• 1 and 2 only

• 1 and 3 only

• 1, 2 and 3

Liquid-in-glass thermometer operates based on

• the expansion and contraction of liquid when there is a difference in temperature.

• the expansion and contraction of liquid when there is a difference in thermal energy.

• the change in conductivity of liquid under the influence of temperature.

• the change in mass of liquid under the influence of temperature.

A cup is filled with 0.5 kg of water at a temperature of 50 ^oC and a bathtub is filled with 50 kg of water at 30 ^oC. Which of the following is false?

• There is more thermal energy stored in the bathtub than in the cup.

• When placed together, heat will flow from the bathtub to the cup.

• There is more mass of water in the bathtub than in the cup.

• The water in the cup has a higher temperature than the water in the bathtub.

Three glasses of water of the same mass are placed side by side touching each other as shown. Given that glass A is 30 ^oC, glass B is 40 ^oC and glass C is 50 ^oC, which of the following is true?

• Heat flows from glass A to glass B.

• Heat flows from glass C to glass B and from glass B to glass A.

• Heat flows in all direction.

• Heat does not flow among these 3 glasses.

Three glasses of water of the same temperature are placed side by side touching each other as shown. Given that glass A contains 0.3 kg of water, glass B contains 0.5 kg of water and glass C contains 0.1 kg of water, which of the following is true?

• Heat flows from glass A to glass B.

• Heat flows from glass B to glass A and from glass B to glass C.

• Heat flows in all direction.

• Heat does not flow among these 3 glasses.