Q1. 150 grams of boiling water (temperature 100 C, heat capacity 4.2 J/gram/K) are poured into an aluminum pan whose mass is 870 grams and initial temperature 22 C (heat capacity of aluminum is 0.8 J/gram/K). After a short time, what is the temperature of water?
Q2. A rifle with a barrel length of 56 cm fires a 14 g bullet with a horizontal speed of 350 m/s/s. The bullet strikes a block of wood and penetrates to a depth of 13 cm.
How long does it take the bullet to come to rest?