How much Gravitational Potential Energy does 5000 gallons (18,925 kg) of water have in a 50 meter tall water tower?

Mountain climbers carry bottled oxygen when at very high altitudes, since the atmosphere contains less and less as you go higher up. a. Assuming that a mountain climber uses 3.92 liters of oxygen per minute, calculate how many liters of oxygen a climber would need for 11 h of climbing. (These are liters at sea level.) Note that only 40% of the inhaled oxygen is utilized; the rest is exhaled.  b.  How much useful work does the climber do, in joules, if he and his equipment have a mass of 97.5 kg and he gains 1150 m of altitude?  c. What is his efficiency for the 11-h climb? Assume his total energy consumption is 1370 W.

2. A 2.0 lb. rock and a 20.0 lb. rock are dropped from rest at 50.0 m above the ground. Ignoring air resistance, which of the following statements about the rocks are true or false? Justify why each statement is true of false. a. Both rocks have equal initial gravitational potential energy.    b. Both rocks will have equal acceleration as they fall.   c. Both rocks will have equal speed upon striking the ground.    d. Both rocks will have equal kinetic energy upon hitting the ground.

Kindly solve both questions correctly in 20 minutes and get the thumbs up