Which statement about projectile motion is true?

The hang time of a projectile is greatest for a vertical launch.

explanation:

the masses of the objects and the distance between them

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.