Adriver is moving at 17.0 m/s when she sees a child on a bike 65m ahead of her. if the car can brake at 4.9 m/s2 and the drivers reaction time is 1.6 s, can she avoid hitting the child

Explanation:

First, find the distance she travels before reacting:

Δx = v₀ t + ½ at²

Δx = (17.0 m/s) (1.6 s) + ½ (0 m/s²) (1.6 s)²

Δx = 27.2 m

Now find the distance she travels before stopping:

v² = v₀² + 2aΔx

(0 m/s)² = (17.0 m/s)² + 2 (-4.9 m/s²) Δx

Δx = 29.5 m

The total distance traveled is:

27.2 m + 29.5 m = 56.7 m

56.7 m is less than 65 m, so yes, she can avoid hitting the child.

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

its a circle not a square that's simple silly.

explanation: