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. In 5 min temperature of ball rises from 20^(0)C to 30^(0)C. Total energy lost from the ball in this time interval 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. In 5 min temperature of ball rises from 20^(0)C to 30^(0)C. Total energy lost from the ball in this time interval is
Answer» 250J 500J 750J 1000J Answer :D