A simple pendulum oscillates 20 times in 40 seconds, find the time period of the pendulum.

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Hen a gfci receptacle device is installed on a 20-ampere branch circuit (12 awg copper), what is the minimum volume allowance (in cubic inches) required for conductor fill for each conductor in the outlet box?