What does this equation mean fede=frdr

According to the tide table below what time of day will the highest tide occur?

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton

The ability to make things happen is also called a. heat b. force c. matter d. energy