A lead ball at `30^@C` is dropped from a height of `6.2km`. The ball is heated due to the air resestance and it completely melts just before reaching the ground. The molten substance falls slowly on the ground. Calculate the latent heat of fusion of lead. Specific heat capacity of lead `=126 J//Kg-^(@)C` and the melting point of lead `=330^@C`. Assume that any mechanical energy lost is used to heat the ball.

A lead ball at 30^(@)C is dropped from a height h. The ball is heated due to the air resistance and it completely melts just before reaching the ground, The molten substance falls slowly on the ground. Latent heat of fusion of lead is 22200 Jk//g . Specific heat capacity of lead =126J//kg-^(@)C and melting point of lead =330^(@)C , Assume that all mechanical energy lost is used to heat the ball. Find the value of h in km ? ("Use" g=10 m//s2)

A lead ball at 25^@ C is dropped from a height of 2 km. It is heated due to air resistance and it is assumed that all of its kinetic energy is used in increasing the temperature of ball. Find the final temperature of the ball.

A lead ball at 25^@ C is dropped from a height of 2 km. It is heated due to air resistance and it is assumed that all of its kinetic energy is used in increasing the temperature of ball. Find the final temperature of the ball.

A 10 kg ball is dropped from a height of 10m. Find (a) the initial potential energy of the ball. (b) the kinetic energy just before it reaches the ground, and (c ) the speed just before it reaches the ground.

A 10 kg ball is dropped from a height of 10 m. Find (a) the initial potential energy of the ball, (b) the kinetic energy just before it reaches the ground and (c) the speed just before it reaches the ground.

10 g of ice at 0°C absorbs 5460 J of heat energy to melt and change to water at 50^@ C. Calculate the specific latent heat of fusion of ice. Specific heat capacity of water is 4200 J kg^(-1) K^(-1) .

A 5kg ball is dropped from a height of 10 m. (a) Find the initial potential energy of the ball. (b) Find the kinetic energy, just before it reaches the ground and (c ) Calculate the velocity before it reaches the ground.

A 10 kg ball is dropped from a height of 10m. Find (a) the initial potential energy of the ball. (b) the kinetic energy just before it reaches the ground, and (c ) the speed just before it reaches the ground. (AS_(1))