Experiment Scenario: Amelia loves to play golf but hates it when her golf balls go into the water. Some brands seem to soak up so much water that they never quite make it to the green
again. She has decided to test her dad's three favorite brands of golf balls to see which brand holds
the most water and would hinder her game.
Questions: The fact that she is going to use the same kind and amount of water to submerge each
ball is an example of a
variable. The weight of each ball after soaking in water
for ten minutes is an example of the
variable. The three different brands of golf
ball she will use is an example of the
variable.

an energy transformation flow diagram is shown

where is it ?

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