The part of the electromagnetic spectrum has a shorter wavelength than ultraviolet light is x-rays.
It is D, you can not replace minerals. This makes them valuable.
Echo sounding is a type of SONAR used to determine the depth of water by transmitting sound pulses into water. The time interval between emission and return of a pulse is recorded, which is used to determine the depth of water along with the speed of sound in water at the time.
