1. How much heat is required to raise the temperature of 415 g of water from 20°C to 32°C?
2. How much work is required to push a crate at constant velocity with a force of 195 N across a floor a distance of 8 m?
How many calories of thermal energy are produced by the friction?
3. During a process, 28 J of heat are transferred into a system, while the system itself does 12 J of work. What is the change in the internal energy of the system?
4. How much heat is required to convert 175 g of ice at -6°C to water at 6°C?
5. What would happen if absolute zero could be reached?
6. An engine takes in 8000 cal of heat and exhausts 4000 cal of heat each minute it is running. How much work does the engine perform each minute?