If water is kept instead of mecrury in barometer then find out the height of water.

A conical flask is full of water. The flask has base radius r and height h. This water is poured into a cylindrical flask of base radius m. The height of water in the cylindrical flask is__

The length of a cuboidal tank is 20 metres. The height of the water- level in the tank decreases by 15 cm when 18 kilolitres water is taken out from the tank. Then find the breadth of the tank.

A conical pot of internal radius 5 cm and height 24 cm is filled with water . It this water is poured into a right cylindrical pot of radius 10 cm , then what will be the height of water - level into the pot ?

A U-tube is partly filled with water. A liquid, immiscible in water, is poured into one arm until the level of the liquid comes to a height h above the water level in the other arm. The water in the second arm is at a height d above its previous level in this arm. Calculate the density of the liquid.

The centre of gravity of a hollow cylinder of mass 200 g is 10 cm above its base. If 500 g of water is poured into the cylinder the water level comes up to a height of 6 cm. What will be the height of the centre of gravity of the cylinder containing water?

Water drops from a height of 50 m in a waterfall. Find out the rise in temperature of water, if 75% of its energy is converted into heat and absorbed by water. (J = 4.2 xx 10^(7) erg cdot cal^(-1) , g = 9.8 m cdot s^(-2))

From a point at a height of 30 metre from the water level of a lake the angle of elevation of an aeroplane is 30^@ and the angle of depression of the shadow of the aeroplane in water of the lake is 60^@ . What is the height of the aeroplane from the water surface of the lake?

A rubber ball of mass 10 g and radius 2 cm is submerged in water up to a depth of 5 cm and released. Find the height up to which the ball pops up above the surface of water, neglecting the resistance of water and air. The density of water = 1g*cm^(-3) .