One swimmer in a relay race has a 0.53 s lead and is swimming at a constant speed of 4.49 m/s. the swimmer has 55.3 m to swim before reaching the end of the pool. a second swimmer moves in the same direction as the leader. what constant speed must the second swimmer have in order to catch up to the leader at the end of the pool? answer in units of m/s.

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?