A metal ball of mass 1kg is heated by means of a 20W heater in a room at `20^(@)C` . The temperature of the ball becomes steady at `50^(@)C` . (a) Find the area of loss of heat to the surrounding when the ball is at `-50^(@)C` . (b) Assuming Newton's law of cooling, calculate the rate of loss of heat to the surrounding when the ball is at `30^(@)C` . (c) Assume that the temperature of the ball rises uniformly from `20^(@)C` to `30^(@)C` in 5 minutes. Find the total loss of heat to the surrounding during this period. (d) Calculate the speific heat capicity of the metal.

A metal ball of mass 1kg is heated by means of a 20W heater in a room at 20^(@)C . The temperature of the ball becomes steady at 50^(@)C . (a) Find the rate of loss of heat to the surrounding when the ball is at 50^(@)C . (b) Assuming Newton's law of cooling, calculate the rate of loss of heat to the surrounding when the ball is at 30^(@)C . (c) Assume that the temperature of the ball rises uniformly from 20^(@)C to 30^(@)C in 5 minutes. Find the total loss of heat to the surrounding during this period. (d) Calculate the specific heat capacity of the metal.

A metal ball of mass 2kg is heated means of a 40W heater in a room at 25^(@)C . The temperature of the ball becomes steady at 60^(@)C . Find the rate of loss of heat to the surrounding when the ball is at 39^(@)C .

A metal ball of mass 2kg is heated means of a 40W heater in a room at 25^(@)C . The temperature of the ball beomes steady at 60^(@)C . Find the rate of loss of heat to the surrounding when the ball is at 60^(@)C .

A metal ball of mass 2kg is heated means of a 40W heater in a room at 25^(@)C . The temperature of the ball beomes steady at 60^(@)C . Find the rate of loss of heat to the surrounding when the ball is at 60^(@)C .

Newton's law of cooling applies when a body is losing heat to its surroundings by

A metal ball of mass 2kg is heated means of a 40W heater in a room at 25^(@)C . The temperature of the ball beomes steady at 60^(@)C . Assume that the temperature of the ball rises uniformly from 25^(@)C to 39^(@)C "in" 2 minutes. Find the total loss of heat to the surrounding during this period.

A metal ball of mass 2kg is heated means of a 40W heater in a room at 25^(@)C . The temperature of the ball beomes steady at 60^(@)C . Assume that the temperature of the ball rises uniformly from 25^(@)C to 39^(@)C "in" 2 minutes. Find the total loss of heat to the surrounding during this period.

A metal ball of 1kg mass is heated by a 20W heater in a room at 20^(@)C . After some time temperature of ball becomes steady at 50'^(@)C . Find the rate of loss of heat by the ball to surrounding when its temperature becomes 50^(@)C . Also find the rate at which it looses heat to the surrounding when its temperature was 30^(@)C .

A metal ball of mass 1 kg is heated by means of a 20 W heater in a room at 20^(@)C . The temperature of the ball becomes steady at 50^(@)C . Assume newton's law of cooling to hold good in the given situation. The temperature of the ball rises uniformly from 20^(@)C to 30^(@)C in 5 minutes. select the correct alternatives (1) The rate of heat loss by ball to surrounding is 20 W, when it is at 50^(@) (2) The rate of heat loss by ball to surrounding is (20)/(3)W , when it is at 30^(@)C (3) The rate of heat loss by ball to surrounding 20 W, when it is at 30^(@)C (4). The specific heat capacity of the gas is 500 J/kg K.

A metal bal of mass 1 kg is heated by means of a 20 W heater in a room at 20^(@)C . The temperature of the ball becomes steady at 50^(@)C . Assume newton's law of cooling to hold good in the given situation. The temperature of the bal rises uniformly from 20^(@)C to 30^(@)C in 5 minutes. select the correct alternatives (1) The rate of heat loss by ball to surrounding is 20 W, when it is at 50^(@) (2) Ther ate of heat loss by ball to surrounding is (20)/(3)W , when it is at 30^(@)C (3) The rate of heat loss by ball to surrounding 20 W, when it is at 30^(@)C (4). The specific heat capacity of the gas is 500 J/kg K.