Saved Students are asked to design an experiment about Newton’s 2nd Law. One student decides to roll a marble down a ramp into a pile of sand to measure the force of impact.

Which variable should they manipulate to best exemplify the relationship explained by this law?

Question options:

A. Use a heavier marble, because a bigger marble will accelerate more quickly down the ramp and cause a greater impact force.

B. Decrease the slope of the ramp, because a ramp with a smaller slope will allow the ball more time to build up speed and cause a greater impact force.

C. Increase the slope of the ramp by propping it up to higher height, because a steeper ramp will cause a greater rate of acceleration and a larger impact force.

D. Use a lighter marble, because the marble will roll at the same rate of acceleration but less mass will produce a larger impact force.

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:

0.19 m/s and 0.45 m/s

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge