Online Test physics 04

1.The unit of heat energy is

2.Solar radiation is preferred to other sources of energy because

3.Solar constant can be determined by

4.The direction of the heat flow between two objects depends on

5.When very hot dishes or beakers made of Pyrex and prosily are plunged into cold water

6.Metals are good conductors of heat because

7.Absolute zero is the temperature at which

8.Mercury is used in thermometers because,

9.In very cold countries, alcohol is used as a thermometric liquids because

10.For accurate scientific work, temperature are often measured by

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