Fig. 3.2 shows how the displacement of air molecules at an instant of time, varies with distance along the path of a sound wave. 7
displacement
0
0
distance along path of sound wave
(c)
Sound waves can also travel in water.
State how the speed of sound in water compares with the speed of sound in air.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

2.6 and i can kick good lol