Question

A container is filled with water and the pressure at the bottom of the container is P. Then the container is emptied halfway and topped off with oil of density 800 kg/m³, which floats on top of the water. What is the pressure at the bottom of the container now?

A) A pressure > P

B) The same pressure P

C) A pressure < P

D) This is not possible to answer with the information given

4. A camper heats 25 L of water to boiling to get hot water for a bathing. What volume of water from a 12^oC stream must he then add to get the bath water to 42^oC ?

A) 25 L

B) 48 L

C) Not enough information to tell.

D) 30 L

E) 55 L

5. Twenty grams of a solid at 70�C is placed in 100 grams of a fluid at 20�C. Thermal equilibrium is reached at 30�C. The specific heat of the solid _____

A) is more than that of the fluid.

B) cannot be compared to that of a material in a different phase.

C) is less than that of the fluid.

D) is equal to that of the fluid.

Answer 1

3) Pressure at the bottom when water is only present -P Pressure at the bottom, = 10005; +800 -900gh Hence the final pressure at the bottom is less than that of pressure when water is only present in the container. Thus the answer is Thus the answer is; C) A pressure< P