Acar is going south on i-69 at 33 m/s (74 mph). the car has good brakes so its maximum braking acceleration is – 8.5 m/s^2 . traffic has come to a stop in all lanes 120 m ahead. what is the maximum reaction time the driver can have and still be able to stop in the available distance? hint: during the driver’s reaction time, the car continues to have the initial velocity of 33 m/s.

1.69515 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration

The distance between the traffic and the car after braking is 120-64.06 = 55.94 m

Time = Distance / Speed

The reaction time cannot be more than 1.69515 seconds

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