The two continental ice sheets that exist in the world today are:

magnityde and direction

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.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.