Evaluate a race car accelerates on a straight track from 0 to 100 km/h in 6 s another race car accelerates from 0 to 100 km/h in 5s. Compare the velocities & accelerations of the cars during their races.

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.

the doppler effect is used by weather forecasters to measure 

moving clouds