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प्रश्न
It is a hot summer day, Priyanshi and Ali are wearing cotton and nylon clothes respectively. Who do you think would be more comfortable and why?
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उत्तर
Priyanshi is wearing cotton clothes which are more comfortable in summers because cotton absorbs the sweat which causes cooling on evaporation. Ali is wearing nylon clothes that do not absorb sweat. Hence, Ali will be uncomfortable.
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संबंधित प्रश्न
Molecules of a substance are always in a state of............ and so they possess .............
Differentiate between melting point ,giving atleast one example of each.
Explain the term Melting.
Describe an experiment to demonstrate that a substance absorbs heat during melting without change in its temperature.
Water as ice has a cooling effect, whereas water as steam may cause severe burns. Explain these observations.
A glass tumbler containing hot water is kept in the freezer compartment of a refrigerator (temperature < 0°C). If you could measure the temperature of the content of the tumbler, which of the following graphs (Fig.1.2) would correctly represent the change in its temperature as a function of time.
A change of state is a change of a substance from ______.
The solid, liquid, and phases of water can coexist in equilibrium at ______.
Define latent heat of fusion?
Explain the following effects of heat.
Change in state
