2kg of H2O is contained in a piston-cylinder arragment at atemperature of 20 deg

Question

2kg of H2O is contained in a piston-cylinder arragment at atemperature of 20 degrees celcius and an absolute pressure of200kPa. a) If the atmospheric pressure is 100kPa, what is the force,F, needed to cause the initial pressure? I know the answer is F=4.14159 but I don't know how myproffesor got there. b) What is the initial heith of the volume occupied by thewater, H_1? I know the answer is H_1=6.4 cm but again, I don't know how hegot there. He gives a diameter of 20cm. 2kg of H2O is contained in a piston-cylinder arragment at atemperature of 20 degrees celcius and an absolute pressure of200kPa. a) If the atmospheric pressure is 100kPa, what is the force,F, needed to cause the initial pressure? I know the answer is F=4.14159 but I don't know how myproffesor got there. b) What is the initial heith of the volume occupied by thewater, H_1? I know the answer is H_1=6.4 cm but again, I don't know how hegot there. He gives a diameter of 20cm.

Explanation / Answer

Is the diameter of 20 cm given?

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