If it can be observed without changing the identity then it is a physical property.
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Answer:
option 1 and 4
Explanation:
It flows from high pressure to low pressure as air is made up of gases and gases move according to the process of diffusion.
It moves from lower density to higher density as pressure is inverse to density. As density is not what makes the air move it is pressure.
Answer:
False. That's the definition of cellular respiration.
