You place an ice cube of mass 7.50×10−3kg and temperature 0.00∘c on top of a copper cube of mass 0.220 kg. all of the ice melts, and the final equilibrium temperature of the two substances is 0.00∘c. what was the initial temperature of the copper cube? assume no heat is exchanged with the surroundings.

Explanation:

As we know that here final equilibrium temperature is 0 degree C

so we can use energy conservation here

heat given by the cube = heat absorbed by the ice

so we have

so here we have

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.