Ascientific is a scientific explanation formulated based on known facts and repeated testing.

What type of electromagnetic wave is used in security pens? a. x-rays c. microwaves b. visible light d. ultraviolet radiation select the best answer from the choices provided

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?