What must the charge (sign and magnitude) of a 1.70 gg particle be for it to remain balanced against gravity when placed in a downward-directed electric field of magnitude 640 N/CN/C ? Express your answer in coulombs.

How is zig zagging a form of acceleration?

Aspectroscope breaks light up into its colors, allowing scientists to analyze light from the solar system and universe. by studying the spectral line patterns, widths, strengths and positions, scientists can determine the speed, position, and of celestial bodies. a) age b) origin c) rotation d) temperature

Am i correct on these two physics questions?