1. You are driving south on the 405 at a speed of 30 m/sec. You see a car accident ahead
and step on the brake. Your car slows to 9 m/sec in 1.5 sec. Calculate the acceleration of
your car during this time period.

2. Your friend is talking in class and you decided to throw an eraser at them to shut them
up. If your friend is sitting 3 meters from you and it took half of a second to hit your friend, calculate the velocity of your eraser.

3. You drop an egg out of your 10 m 2nd story window. If it took 1.43 sec, calculate the
velocity right before the egg hits the ground.

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