Which of the following is the best example of uniform circular motion? a. a child riding on a constantly spinning merry-go-round b. a car on a road curving back and forth as it passes through hills c. a pendulum bob swinging back and forth in a curved path d. a baseball that is hit up and out of the park for a home run

A. because as the merry-go-round spins the child accelerates towards the center of the merry-go-round at a uniform rate.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms