In 1960 military pilot joseph kittinger jumped from a high altitude balloon in a fully pressurized jump suit about 100,000 feet, in the stratosphere, all the way to the ground. when in the stratosphere he felt like he was floating, even though he was free-falling in space. when he reached the troposphere he could feel the wind resistance and it no longer felt like he was floating. why was this likely the case?

because the troposphere has more oxygen than the stratosphere so when he felt like he was floating even though he was free falling it was due to the absence of air.

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:

double the distance = divide strength by 4