Heat Test - 29...

$$500 g$$ of hot water at $${ 60 }^{ \circ  }C$$ is kept in the open till its temperature falls to $${ 40 }^{ \circ  }C$$. Calculate the heat energy lost to the surroundings by the water. ( specific heat of water = 4200 J $${ { kg }^{ -1 } }^{ \circ  }{ C }^{ -1 }$$)

Before using the clinical thermometer mercury level should be below:

On a cold day when a room temperature is $$15^oC$$, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of $$15^oC$$, because

The degree of hotness or coldness of a body is ......... .

Lake water never completely freezes because

Among the following what should not be done while or before using a clinical thermometer?

In experiment of heat transfer by convection, water inside the pipe completely gets heated (with the application of heat source). This can be explained best by which of the following statements,

Boiling water can be measured by 

A laboratory thermometer is dipped in a beaker containing hot water. As the thermometer is removed the mercury level will

What is the measurement of temperature in Celsius scale in the above figure?