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Gravitational force is required for :
A
Stirring of liquid
B
Convection
C
Conduction
D
Radiation
Detailed Solution
In natural convection, the heated fluid expands, becomes less dense and rises, while the colder, denser fluid sinks. This motion is driven by buoyancy, which depends on gravity.
Without gravity (e.g. in a spacecraft), there is no buoyancy, so natural convection does not occur.
Conduction and radiation do not need gravity, and stirring is done mechanically.
So gravitational force is required for convection.
Without gravity (e.g. in a spacecraft), there is no buoyancy, so natural convection does not occur.
Conduction and radiation do not need gravity, and stirring is done mechanically.
So gravitational force is required for convection.