A solid conducting sphere with radius R that carries positive charge Q is concentric with a very thin insulating shell of radius 2R that carries charge −2Q. The charge −2Q is distributed uniformly over the insulating shell. Part A Find the magnitude of the electric field in the region 0

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

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

If anyone who can me with this hw? i would really appreciate it