g A ring of charge is placed in the x-y plane, centered at the origin. The electric field along the axis of a negative ring of charge... points towards the ring along the z-axis. points away from the ring along the z-axis. always points in the positive z-direction. none of these choices

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:

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

massxgravity x heght=weightxheight= pe

4900=490xh

h=10

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.