A metal ball of density `7800" kg"//m^(3)` is suspected to have a large number of cavities. It weighs `9.8` kg when weighed directly on a balance and `1.5`kg less when immersed in water. The fraction by volume of the cavities in the metal ball is approximately

A metal piece weighs 200gf in air and 150 gf when completely immersed in water. Calculate the relative density of the metal piece.

A heavy ball weighing 5 N displaces 100 ml of water when immersed in water. Calculate the apparent weight of the ball in water.

An iron casting weighs 27kg in air 18kg in water. What is the volume of the covities in the casting ? (Density of iron =7800kgm^(-3) )

The density of the material of an idol is 10.5g*cm^(-3) . The mass of the idol is 400 g and it weighs 358gxxg when completely immersed in water. Determine the volume of the cavity inside the idol.

A shotput is a metallic sphere of radius 1 cm and It weighs 26.4 kg. Find the density of the metal.

A spring balance A reads 2 kg with a block suspended from it. Another balance B reads 5 kg when a beaker with liquid is put on the pan of the balance. When the block is immersed in water

3.5 kg mass of a metal plate has the volume of 1.5m^(3) . Find the density of metal plate.

A goldsmith desires to test the purity of a gold ornament suspected to the mixed with copper. The ornament weighs 0.25 kg in air and is observed to displace 0.015 litre of water when immersed in it. Densities of gold and copper with respect to water are, respectively, 19.3 and 8.9 . The approximate percentage of copper in the ornament is