H2o cl2 nh3 what do all of these compounds have in common? a) they are all ionic. b) they are all covalent. c) they all are positively charged. d) they all are negatively charged.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

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

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.