A 1/40 scale model is to be used in a towing tank to study the water motion near the bottom of a shallow channel as a large barge passes over . Assume that the model is operated in accordance with the Froude number criteria for dynamic similitude. The prototype barge moves at a typical speed of 13 knots. (a) At what speed (in ft/s) should the model be towed?
(b) Near the bottom of the model channel a small particle is found to move 0.12 ft in one second so that the fluid velocity at that point is approximately 0.12 ft/s. Determine the velocity at the corresponding point in the prototype channel.

I t hi ink the answer is a

Explanation:

I hoped this helpes

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