A60 vibration per second wave travels 30 meters in one second. what is its frequency and wave speed?

frequency: 60 Hz, speed: 30 m/s

Explanation:

- The frequency of the wave is equal to the number of complete vibrations per second. For the wave in the problem, we have 60 vibrations per second, so the frequency is

- The speed of a wave is given by

where d is the distance travelled and t the time taken. The wave in this problem travels a distance of d=30 m in a time of t=1 s, so the speed of the wave is

answer: decibel

explanation:

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