At what temperature will the velocity of sound double than thevelocity in air at 22°ca) 1000k b) 1180k c) 1120kd)1200k

Describe the path of a ray that approaches a mirror parallel to the principal axis.

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.