A 1500- kilogram vehicle traveling at a 15 meters per second crashes into a car with a mass of 2500 kilograms. After the collision both vehicles are locked together and slide. Eventually, both cars that were locked together were brought to rest by a force of Kinetic Friction as the rubber tires slides across the dry, level, asphalt road surface. [Show all work including the equations and substitutions with units] ∙ Calculate the speed of locked-together cars immediately after the collision.
.Calculate the magnitude the magnitude of the frictional force that brings the locked together vehicles to rest.

it doesn't. it was imagined up in the middle ages.

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

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2