The standard height of a goal post in American football is 3.3 m high. A)Suppose Cimaglia kicks the ball at an angle of 39 degrees, what must be the minimum speed with which he must kick the ball to clear the goal post if he is kicking from 35 yards away? (Report your answer in ft/s.) *This is a hard problem but hang in there!(include units with answer)B)If he kicks the ball with the speed you calculated in part A, at the same angle and distance, what will be the speed of ball (in ft/s) as it passes over the goal post?(include units with answer)

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

3. dark matter

empty space could also be a simple vacuum