A 4,000 kilogram truck travels in a straight line at 10.0m/sec. What it's momentum?

40000

Explanation:

p=m*v

4000*10

40000

are there answer choices to this question? this seems like a question where you have options to choose from.

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.