A child pulls a 15kg sled containing a 5.0 kg dog along a straight path on a horizontal surface. He exerts a force pf 55 N on the sled at an angle of 20 above the horizontal, as shown in the figure above. The coefficient of friction between the sled and the surface is 0.22.

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.

helium

oxygen

neon

sodium