An I R spectrum has percent transmittance from 0 to 100 percent on the y axis and wave number in inverse centimeters from 4000 to 600 on the x axis, with peaks, or bands, pointing downwards. There is a strong, very broad band in the 3600 to 3100 inverse centimeter range, a strong, spiked peak in the 3000 to 2800 inverse centimeter range, a weak peak near 1850 inverse centimeters, a sharp peak near 1640 inverse centimeters, a series of spiked bands in the 1500 to 1200 inverse centimeter range, and two strong bands at 990 and 910 inverse centimeters. Which compound matches the IR spectrum

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

a sonic boom is a loud boom that breaks the sound barrier

explanation:

the answer should be in the picture.