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प्रश्न
Molecules of a substance are always in a state of............ and so they possess .............
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उत्तर
Molecules of a substance are always in a state of motion and so they possess kinetic energy.
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संबंधित प्रश्न
Explain the term Melting Point.
The fixed temperature at which matter changes state from solid to liquid is called ______.
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.
______ is the changing of a liquid into its solid state and it happens by cooling.
Sweating causes cooling because water has a ______.
A change of state is a change of a substance from ______.
The solid, liquid, and phases of water can coexist in equilibrium at ______.
Explain the following effects of heat.
Change in state
Define the following:
Melting or fusion:
