Which of the following is a device that breaks down light into colors
and produces an image of the
spectrum, which can help
determine the chemical
composition of a star?

A. barometer
B. phonograph
ald
C. spectograph
D. altimeter

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

Anybody wanna ? (picture included? )

The electric potential a distance r from a small charge is proportional to what power of the distance from the charge? a. r^-1 b. r c. r^-2 d. r^2