Revision: Thermal Physics Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 10 Thermal Physics - Revision Quiz Test your understanding of Thermal Physics here: 1 / 5 1) Extremely small pollen grains in water are viewed through a microscope. The grains are seen to move continually and randomly. What is the reason for this random movement? The grains are moved by randomly moving water molecules. The grains are moved by random convection currents in the water. The grains are moved by the random motion of their own atoms. The grains are moved by random rays of light reflecting off them. 2 / 5 2) Liquids P and Q have the following properties. Which of the following correctly explains which liquid is more suitable for building a liquid-in-glass thermometer that is able to measure very low temperatures? Liquid P because it is a poorer thermal conductor than Liquid Q. Liquid Q because it remains in the liquid state for a wider range of temperature. Liquid Q because it has better conductivity than Liquid P. Liquid P because it has a lower freezing point than Liquid Q. 3 / 5 3) Ice at –10 ºC is heated until it is water at 10 º°C. Which graph shows how the temperature changes with time? D C B A 4 / 5 4) 2017 S4 EOY P1 Q29 A can of soft drinks and a plastic bottle of drinking water are taken out from the refrigerator at the same temperature. Which of the following gives the correct description and explanation when both are touched? They will feel the same to you since they have the same temperature. The can of soft drinks feels much cooler since metal is a good conductor of heat. They will feel the same to you since what you feel does not depend on the nature of the material. The bottle of drinking water feels much cooler since plastic is a good insulator that traps the coldness. 5 / 5 5) The graph shows the variation of temperature change ∆θ with time t for 1.0 kg of a substance, initially solid at room temperature. The substance is heated at a uniform rate of 2000 J min−1 . What can be deduced from this graph? After 10 min of heating, the substance is all gaseous. The specific heat capacity of the substance is greater when liquid than when solid. The specific latent heat of fusion of the substance is 6000 J kg−1 . After 4.0 min of heating, the substance is all liquid. Your score is Restart quiz
