Oscillation of a 260 hz tuning fork sets up standing waves in a string clamped at both ends. the wave speed for the string is 640 m/s. the standing wave has four loops and an amplitude of 3.1 mm.
(a) what is the length of the string?
(b) write an equation for the displacement of the string as a function of position and time. round numeric coefficients to three significant digits.

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?