When a rifle with a longer barrel is fired, the force of expanding gases acts on the bullet for a longer distance. what effect does this have on the velocity of the emerging bullet? (do you see why long-range cannons have such long barrels? )

The velocity will be increased.

Explanation:

As the force will be exerted for long time on a bullet because the length of barrel is more, it will give more thrust to the bullet for a longer time hence the velocity will be more.

When bullet is shot, the gun powder is burned, so the more time it will be in the barrel, the more it will get accelerated, thus long barrel provides greater velocity to bullet. It even helps to give bullet a proper direction.

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: