Two cylinders of different area of cross section are connected to each other with a pipe. The area of cross section of wider cylinder is 800 `cm^2`?. If a mass of 16kg is placed on the massless airtight frictionless piston in the wider cylinder, find the difference in the level of water in the two cylinders

The diameter of the ends of a right circular cylinder is 2m 8 dcm. Find the area of its two ends.

Ratio of the cross sectional areas of two wires A and B made up of the same material is 1 : 4 . If the Wires are connected across the same potential difference , find the ratio of heat produced in them .

A U-tube is almost half-filled with mercury. The wider limb has an area of cross-section of 2cm^(2) , and the cross-section of the narrow limb is 1cm^(2) . If 52cm^(3) of water is poured into the wider limb, then what will be the depression of the mercury level in that limb? The density of mercury = 13.6g*cm^(-3) .