1. Aim/Purpose of the investigation To find out the relationship between the mass on a hanger and the stretch of a rubber band
2.
Which variable will be changed? (This is the independent variable)
Give the range of values you plan to use.
3.
What will be measured get some data or information from the investigation? (This is the
dependent variable)
How will it be measured or observed?
I
4. What other variables do you think are important in the investigation and will have to be
controlled to make it a fair test?
Variable
How will this variable be kept the same controlled) or measured?

the body's situation won't change the forces are equal opposit and on the same body

b.

hope this : )

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