2. a car traveling at 32m/s
slams on the brakes after noticing
an obstacle ahead. the car slows
down at a constant rate before
coming to a stop 4.2 seconds
later. how far did the car travel in
the 4.2 seconds it took to stop?
a. 7.6 m
b. 67.2 m
c. 86.4 m
d. 134.4 m

b. 67.2 m

Explanation:

Given:

v₀ = 32 m/s

v = 0 m/s

t = 4.2 s

Find: Δx

Δx = ½ (v + v₀) t

Δx = ½ (0 m/s + 32 m/s) (4.2 s)

Δx = 67.2 m

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia