Q. The specific heat of mercury is 138 J/kg Co Determine the latent heat of fusion of mercury using the following calorimeter data: 1 kg of solid Hg at its melting point of -39.0º C is placed in a 0.620 kg aluminium calorimeter with 0.40 kg of water at 12.8 °C; the resulting equilibrium temperature is 5.06°C.
Q. A uniformly charged disk of radius 35cm carries charge with a density of 7.9x 10-3 C/m2. Compute the electric field on the x axis of the disk at (a) 1 cm, (b) 5cm, (c) 30cm, and (d) 100 cm from the center of the disk.