5. paul is driving a car at a constant velocity of 8 m/s (about 18 mi/hr.) he sees a cat in the road ahead and brakes.
his car accelerates at a rate of -4 m/s/s. how long will it take for his car to stop?
a 28
b. 45
c. 1.26 s
d. 88

2 seconds

Explanation:

We need to use the kinematic equation vf-vi+at and rearrange it to find t.

(if you need help rearranging this question then let me know)

but fully rearranged it's:

vf-vi / a = t

so:

0-8 ÷ -4 = 2

(vi-vf is in brackets, then divided by -4)

If you want to check the answer when you rearrange just take the answer and use it in the unrearranged kinematic equation. So if this was rearranged correctly vf sound equal 0 (use 2 for time)

2 sec

Explanation:

a = v - u / t

-4 = 0 - 8 / t

-4 = -8 / t

-4 / -8 = t

2 sec = t

small = small current large mag large current

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