23) A carpenter is driving a 15.0-g steel nail into a board. His 1.00-kg hammer is moving at 8.50 m/s when it strikes the nail. Half of the kinetic energy of the hammer is transformed into heat in the nail and does not flow out of the nail. What is the increase in temperature of the nail after the three blows that the carpenter needs to drive the nail in completely? The specific heat of steel is 448J/kg.K. A) 2.7 K B) 7.7 K C) 3.6 K D) 1.8 K E) 8.1 K

A certain mass, m, of water has thermal energy added to it until the water is at the boiling point.  Additional thermal energy is added until the entire mass, m, has been phased changed into steam.   a) The temperature of the steam will be less than that of the water at the boiling point.  b) The temperature of the steam will be greater than that of the water at the boiling    point.  c) The temperature of the steam will be the same as that of the water at the boiling    point.  d) The temperature of the steam will be zero.  e) The temperature of the steam will be 2256000K.

The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram are there in a 5.00-g peanut if the energy from burning it is transferred to 0.500 kg of water held in a 0.100-kg aluminum cup, causing a 54.9°C temperature increase?

A 75.0 kg concrete block falls off a 7.5 m tall wall. If all the initial energy of the concrete block is absorbed by itself when it hits the ground. What is the change in temperature of the concrete block (specific heat of concrete is 880 J/kg K)?