Q1. A scuba tank is filled with air to a pressure of 292 atm when the air temperature is 23 degrees celcius. A diver next jump into the ocean and, after a short time treading water on the ocean surface, checks the tank's pressure and finds that it is only 282 atm. assuming the diver has inhaled a negligible amount of air from the tank, what is the temperature of the ocean water?
Q2. Two sinusoidal waves, each of wavelength 5 m and amplitude 10 cm, travel in opposite directions on a 20-m stretched string that is clamped at each end. Excluding the nodes at the ends of the string, how various nodes appear in the resulting standing wave?