A 2.25 kg block slides 12.0 m to the left on a frictionless table a constant velocity of 4.0 m/s. What is the network on the block?

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

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.