Aplane flies from base camp to lake a, 200 km away in the direction 20.0° north of east. after dropping off supplies it flies to lake b, which is 230 km at 30.0° west of north from lake a. graphically determine the distance and direction from lake b to the base camp.

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?