Suppose that you lift four boxes individually, each at a constant velocity. The boxes have weights of 18 N, 6.0 N, 9.0 N, and 12 N, and you do 36 J of work on each. Match each box to the vertical distance through which it is lifted. 2.0 m

Explanation:

It is known that the relation between work and force is as follows.

              w =

where,     = angle between the applied force and direction of movement of the object which is zero in this case. As, cos (0) = 1.

Therefore,    d =

(i)   For w = 36 J, and F = 9 N then value of d will be as follows.

                    d =

                       =

                       = 4 m

(ii)  For w = 36 J, and F = 12 N then value of d will be as follows.

                    d =

                       =

                       = 3 m

(iii)  For w = 36 J, and F = 6 N then value of d will be as follows.

                    d =

                       =

                       = 6 m

(iv)  For w = 36 J, and F = 18 N then value of d will be as follows.

                    d =

                       =

                       = 2 m

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

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