A metal block is placed in a room which is at `10^(@)C` for long time. Now it is heated by an electric heater of power `500W` till its temperature becomes `50^(@)C` Its initial rate of rise of temperature is `2.5^(@)C//sec` The heater is switched off and now a heater of `100W` is required to maintain the temperature of the block at `50^(@)C` The heat radiated per second when the block was `30^(@)C` is given as `alpha` watt. Find the value of `((alpha)/(10))` (Assume Newton's law of cooling to be valid .

A metal block is placed in a room which is at 10^(@)C for long time. Now it is heated by an electric heater of power 500 W till its temperature becomes 50^(@)C . Its initial rate of rise of temperature is 2.5^(@)C//sec . The heater is switched off and now a heater of 100W is required to maintain the temperature of the block at 50^(@)C . (Assume Newtons Law of cooling to be valid) What is the heat capacity of the block?

A metal block is placed in a room which is at 10^(@)C for long time. Now it is heated by an electric heater of power 500 W till its temperature becomes 50^(@)C . Its initial rate of rise of temperature is 2.5^(@)C//sec . The heater is switched off and now a heater of 100W is required to maintain the temperature of the block at 50^(@)C . (Assume Newtons Law of cooling to be valid) What is the heat capacity of the block?

A metal block is placed in a room which is at 10^(@)C for long time. Now it is heated by an electric heater of power 500 W till its temperature becomes 50^(@)C . Its initial rate of rise of temperature is 2.5^(@)C//sec . The heater is switched off and now a heater of 100W is required to maintain the temperature of the block at 50^(@)C . (Assume Newtons Law of cooling to be valid) What is the rate of cooling of block at 50^(@)C if the 100W heater is also switched off?

A metal block is placed in a room which is at 10^(@)C for long time. Now it is heated by an electric heater of power 500 W till its temperature becomes 50^(@)C . Its initial rate of rise of temperature is 2.5^(@)C//sec . The heater is switched off and now a heater of 100W is required to maintain the temperature of the block at 50^(@)C . (Assume Newtons Law of cooling to be valid) What is the rate of cooling of block at 50^(@)C if the 100W heater is also switched off?

A metal block is placed in a room which is at 10^(@)C . It is heated by an electric heater of power 500 W till its temperature becomes 50^(@)C . Its initial rate of rise of temperature is 2.5^(@)C//sec . The heater is switched off and now a heater of 100 W is required to maintain the temperature of the block at 50^(@)C . (Assume Newtons Law of cooling to be valid) (i) What is the heat capacity of the block ? ( ii ) What is the rate of cooling of block at 50^(@)C if the 100W heater is also switched off ? (iii) What is the heat radiated per second when the block was 30^(@)C ?

Heat is generated continuously in an electric heater, but its temperature becomes constant after some time. Why?

Heat is generated continuosly in an electric heater ,but its temperature becomes constant after some time.Why?

A system S receives heat continuously from an electric heater of power 10 W . The temperature of S becomes constant at 50^(@)C when the surrounding temperature is 20^(@)C . After the heater is switched off, S cools from 35.1^(@)C to 34.9^(@)C in 1 minute . the heat capacity of S is

A system S receives heat continuously from an electric heater of power 10 W . The temperature of S becomes constant at 50^(@)C when the surrounding temperature is 20^(@)C . After the heater is switched off, S cools from 35.1^(@)C to 34.9^(@)C in 1 minute . the heat capacity of S is

A system S receives heat continuously from an electric heater of power 10 W . The temperature of S becomes constant at 50^(@)C when the surrounding temperature is 20^(@)C . After the heater is switched off, S cools from 35.1^(@)C to 34.9^(@)C in 1 minute . the heat capacity of S is