A 10 cm wide box is held between two springs in a 1 m gap on a frictionless surface. The left spring has a natural length of 80 cm and spring constant of 200 N/m. The right spring has a natural length of 90 cm and spring constant of 350 N/m. How far is the center of the box from the left edge in m

The distance is  

Explanation:

From the question we are told that

     The width of the box is

     The gap is of length

    The natural length of the first spring is

     The spring constant of the first spring is  

     The second spring has a natural length of

      The spring constant of the first spring is  

Let the distance from the center of the box to the left edge be x

      So at equilibrium

The force applied by the first spring is

and

The force applied by the second spring is

Now at equilibrium

So

    substituting values

        =>  

        =>  

          =>  

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