The kentucky derby, the first leg of horse racing’s triple crown, was won by a time of 122.2 s. if the race covers 2011.25 m, what was the average speed in a) m/s and b) in mi/h?
20 extra points!

a) b)

Explanation:

The average speed is given by the formula:

The distance covered is 2011.25m , and the time is 122.2s.

Replacing in the formula:

Resulting in a) .

To get the result in mi/h, do the following conversion:

Knowing : 1 mi = 1603 m   and  1 h = 3600 seg

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.

conservation of mass

mass before something happens = mass afterwards