You and your friends have decided to use fireworks and create a rocket cart for your stuffed animals. Starting from the rest, your rocket cart maintains a constant acceleration is 10m/s/s and travels 20 meters. How long did it take for your rocket cart to travel that 20 meter?

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.

b.a device that inputs heat into a cool object