How much better is the resolution of the gaia spacecraft compared to the human eye (which can resolve about 1 arcmin)?

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

What does si stand for,when referring to a system of measurement

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?