In an experiment of study of Newton.s law of cooling, a ball of metal is heated from inside a heater of 20 W in a room maintained at constant temperature of 20^(0)C. Following observations are made. i) Mass of the ball is 1 kg ii) Rate of increases of temperature decreases with rise of temperature iii) Temperature of ball becomes 50^(0)C after some tiime and then remains constant. iv) Specific heat of mettal is 500" Jkg"^(-1)""^(0)C^(-1). Corresponding to above observations, answer the following questions. Assuming Newton.s law of cooling holds for the ball, rate of loss of heat, when the ball is at 30^(0)C is

In an experiment of study of Newton.s law of cooling, a ball of metal

1.	In an experiment of study of Newton.s law of cooling, a ball of metal is heated from inside a heater of 20 W in a room maintained at constant temperature of 20^(0)C. Following observations are made. i) Mass of the ball is 1 kg ii) Rate of increases of temperature decreases with rise of temperature iii) Temperature of ball becomes 50^(0)C after some tiime and then remains constant. iv) Specific heat of mettal is 500" Jkg"^(-1)""^(0)C^(-1). Corresponding to above observations, answer the following questions. Assuming Newton.s law of cooling holds for the ball, rate of loss of heat, when the ball is at 30^(0)C is
Answer» `(10)/(3)W` `(20)/(3)W` `(30)/(3)W` `(40)/(3)W` ANSWER :B