CBSE - Work Power Energy

Pick the correct statement - (1) Energy is a physical quantity and work is a mathematical quantity. (2) Work is a physical quantity and energy is a mathematical quantity. (3) Both energy and work are physical quantities. (4) Both energy and work are mathematical quantities.

540 gm of ice at 0 0 C is mixed with 540 gm of water at 80 0 C. The final temperature of the mixture is (given that latent heat of fusion of ice = 80 cal/gm, Specific heat of water = 1 cal/gm-C) 1) 80 0 C 2) 4 0 0 C 3) 0 0 C 4) 79 0 C

In the sun four hydrogen nuclei combine to form a helium nucleus and the amount of energy released is - (1) 13 MeV (2) 26 MeV (3) 39 MeV (4) None of these

Energy released per fission of a 92 U 238 nucleus is nearly equal to (1) 931 MeV (2) 1000 MeV (3) 8 MeV (d) 800 MeV

Two bodies with kinetic energies in the ratio 4 : 1 are moving with equal linear momentum. The ratio of their masses is : (1) 1 : 2 (2) 1 : 1 (3) 4: 1 (4) 1 : 4