In speed study number 1, we looked at two cars traveling the same distance at different speeds on city streets. car "a" traveled at a speed of 35 miles per hour. car "b" traveled at 45 miles per hour. both cars traveled a distance of 10 miles. how much sooner did car "b" arrive at its destination than car "a"?

230.4 s

Explanation:

The speed of car A is

and the distance travelled is

so the time taken for car A is

The speed of car B is

and the distance travelled is

so the time taken for car B is

So the difference in time is

Which corresponds to

so car B arrived 230.4 s before car A.

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.

probably not if net force is zero