All objects moving in a circle experience centripetal force The form of centripetal force depend on the object in circular motion & the force causing the circular movement Which of the following describes the correct centripetal force acting on an object moving in a circle? The force of air resistance as a roller coaster performs a loop on a track
The force of friction as a car drives around a corner at constant speed
The force of gravity as a ball on a string is spun horizontaly in a circle
The force of inertia as a person spins on a ride at amusement park

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

a 2,000 calorie based diet.

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