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It takes 4 minutes to raise the temperature of 2.5 kg of a substance by 60 °C using a 2.0 kW heater. Find the specific heat capacity of the substance.
Some lead shots of mass m are placed at the bottom of a vertical cylinder that is 1.2 m long and closed at both ends. The cylinder is suddenly inverted so that the shot falls 1.2 m. By how much will the temperature of the shot increase if this process is repeated 1000 times? Assume no heat loss. [The specific heat capacity of lead is 130Jkg-1oC-1]
A lead bullet is moving at 220 m/s when it strikes a wooden block and is brought to rest. If all the frictional work is converted to thermal energy in the bullet, what is the rise in temperature of the bullet as it is brought to rest? [The specific heat capacity of lead is 130Jkg-1oC-1]
An electric heater supplies 2.5 kW of power in the form of heat to a pail of water. How long will it take to heat the 10 kg of water in the tank from 25 to 100 °C? Assume no heat losses to the surroundings. [Specific heat capacity of water = 4200 J kg-1oC-1]
An aluminium block of mass 1kg at a temperature of 100 °C is placed in 2.0 kg of water at 20 °C. Assuming that no thermal energy is lost to the surroundings, what will be the final temperature of the aluminium and water when they are at thermal equilibrium? [The specific heat capacity of water is 4200Jkg-1°C-1 and The specific heat capacity of aluminium is 900 Jkg-1°C-1]