At the airport, Joan pulls on the strap attached to her suitcase of mass 35.0 kg with a force of 185 N at an angle of 25.0° above the horizontal. The coefficient of kinetic friction between the suitcase and the floor is 0.270. Determine the acceleration of the box while she pulled it along.

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?