Consider a solenoid of length l, n windings, and radius b (l is much longer than b). a current i is flowing through the wire. if the radius of the solenoid were doubled (becoming 2b), and all other quantities remained the same, the magnetic field consider a solenoid of length , windings, and radius ( is much longer than ). a current is flowing through the wire. if the radius of the solenoid were doubled (becoming 2), and all other quantities remained the same, the magnetic field would become one half as strong. would remain the same. would become twice as strong.

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?