1. A water tower on a farm holds 1 m3 liquid water at 20?C, 100 kPa, in a tank on top of a 5-m-tall tower. A pipe leads to the ground level with a tap that can open a 1.5-cm-diameter hole. Neglect friction and pipe losses, and estimate the time it will take to empty the tank of water.
2. Find the speed of sound for air at 100 kPa at the two temperatures 0?C and 30?C. Repeat the answer for carbon dioxide and argon gases.