A 1.70-kg steel ball at 18.5C is dropped from a height of 12.6 m into an insulated container with 4.50 L of water at 10.1C. If no water splashes, what is the final temperature of the water and steel? The specific heat of steel and water is 450 J/(kgK) and 4186 J/(kgK) respectively. C A 72.1-kg sky diver jumped out of an airplane at an altitude of 0.900 km. She opened her parachute after a while and eventually landed on the ground with a speed of 3.40 m/s. How much energy was dissipated by air resistance during the jump? kJ A scuba diver is in fresh water has an air tank with a volume of 0.0100 m3. The air in the tank is initially at a pressure of 1.00 107 Pa. Assume that the diver breathes 0.500 L/s of air. Density of fresh water is 1.00 103 kg/m3. How long will the tank last at depths of 1.50 m? min A long, narrow steel rod of length 2.5000 m at 22.0C is oscillating as a pendulum about a horizontal axis through one end. If the temperature drops to 0C, what will be the fractional change in its period? Estimate the average distance between molecules in air at 0.0C and 1.90 atm. nm yes