A single column vertical manometer is connected to a pipe containing oil of specific gravity 0.9. The area of the reservoir is 80 times the area of the manometer tube. The reservoir contains mercury of specific gravity 13.6. The level of mercury in the reservoir is at a height of 300 mm below the centre of the pipe and difference of mercury levels in the reservoir and right limb is 500 mm. Find the pressure in the pipe.

An aluminum cube of edge length 20 cm floats on mercury. How much extra depth will the cube sink when the temperature rises from 270 K to 320 K?

first three a b and c

4.As shown in the figure, a U-tube pressure gauge containing mercury is installed on the water storage tank. The difference between the water surface height of the water tank and the average height of the mercury surface in the manometer is z. the height difference between the two sides of the mercury surface is 2h. What is the ratio of z to h (z/h)? (The density ratio of mercury to water is s=13.6) Pa Pa Pw water B mercury