A calorimeter of mass 60 g contains 180 g of water at 29°C. Calculate the common final equilibrium temperature of the mixture if 37.2 g of ice at - 10°C is added to it. Specific
heats are given as follows: ice = 2108 J/kg. K, calorimeter = 0.42 J/g.°C, water =
4186J/kg.°C and latent heat of fusion for ice is 333 kJ/kg.

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

Which of the following is an example of motion in two dimensions?

The electric field between square plates of a parallel-plate capacitor has magnitude e. the potential across the plates is maintained with constant voltage by a battery as they are pulled apart to twice their original separation, which is small compared to the dimensions of the plates. the magnitude of the electric field between the plates is now equal to a)e b)e/4 c)e/2 d)4e e)2e