Please Help me

A record player runs at 78 RPMs (revolutions per minute). That means that it spins 78 times (cycles) in a minute. work each one out.

a. Find the frequency of the record player.

b. Find the period of the record player.

(a) The frequency of the record player is 1.3 Hz

(b) The period of the record player is  0.77 s

Explanation:

Given number of revolution per minute = 78 RPM

Part (a) the frequency of the record player

One revolution per minute, 1 RPM = ¹/₆₀ Hz

                                             78 RPM = ?

Thus, 78 RPM = 78 ( ¹/₆₀ HZ) = 1.3 Hz

The frequency of the record player is  1.3 Hz

Part (b) the period of the record player

Period is inverse of frequency

T = 1 / f

T = 1 / 1.3 Hz

T = 0.77 s

The period of the record player is 0.77 s

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.