Jet fuel is sold by the pound. Your jet (parked in Paris) needs 1,500 gallons of fuel. Jet fuel weighs 7.0 pounds per gallon and costs $12.00 per kg. If there are 2.2 pounds in one kilogram, how much do you owe the airport for a "fill-up" of your jet?

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?