1 cc of lead ( relative density 11.4) and 21 cc of wood ( relative desity 0.5) are mixed together . Show weather the combination will float or sink in water.

A piece of ice is floating in a beaker completely filled with a liquid of density 1.5gm/cc. What will happen to the level of water when the ice melts ?

One gm of water at 373 K is converted into steam at the same temperature. The volume of 1 c .c of water becomes' 1671 c.c on boiling. Calculate the change in internal energy of the system if heat of vaporisation of water is 5.4xx10^5calkg^-1 .

A solid body floats on water with 1/4th of its volume above the surface. What fraction of its volume will project above the surface, if it is immersed in a liquid of density 1.2 gm/cc?

0.4 g hydrogen combines with the 3.2 g oxygen to produce water. Hydrogen sulphide is produced by combination of 0.25 g hydrogen and 4.0g sulphur. 1g of sulphur combines with 1 g of oxygen show that the results are in accordance with the law of reciprocal proportion.

Show that the line joining the points (0,2,-4) and (-1,1-2) and the lines joining the points (-2,3,3) and (-3,-2,1) are co-plannr. Find their point of intersection.