You use a full 20 liter compressed air tank with a gauge pressure of 220 atm (at the surface) to fill the balloon from zero volume at depth. Given that the product of pressure and volume stays constant in a gas (as long as the temperature stays constant) and that the pressure inside the balloon equals the ambient pressure, what will be the gauge pressure in the tank once the balloon has been filled to the volume required to lift the boat

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature