High-power lasers are used to cut and weld materials by focusing the laser beam to a very small spot. this is like using a magnifying lens to focus the sun's light to a small spot that can burn things. as an engineer, you have designed a laser cutting device in which the material to be cut is placed 7.0cm behind the lens. you have selected a high-power laser with a wavelength of 1.06 \mum. (this distance and wavelength are both very typical values.) your calculations indicate that the laser must be focused to a 7.0\mum-diameter spot in order to have sufficient power to make the cut. what is the minimum diameter of the lens you must install? express your answer with the appropriate units.

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

answersysvol bloat;

false.

explanation:

this statement is false. after falling for 5 seconds, its speed will not be 100 m/s.

365.25 earth days are in the year of a light year