Physics
Blowing Air with open pipe is an example of :

Isochroric process
Isothermal process
Isobaric process
Adiabatic process

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Physics
An egg sinks in soft water but floats in a concentrated solution of salt because

Egg absorbs salt from the solution and expands
Albumin dissolves in salt solution and egg becomes lighter
Water has high surface tension
The density of salt solution exceeds the density of eggs

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