Acrucial characteristic of turbines in tidal generators is that

How is zig zagging a form of acceleration?

In an experiment, how can i change human errors? be specific.

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.