Use tide and tidal range in the same sentence.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.