Determine the mole fraction of dry air at the surface of a lake whose temperature is 18°C. The air at the lake is saturated, and the atmospheric pressure at lake level can be taken to be 100 kPa.

Q: Instruction: Determine the moment of the force about point 0.

A: Given data as per question

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Q: : Determine the moment of the force about point A.

A: Given: TO determine: Moment about A

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