I don't really get this problem, it involves Coulombs law and we didn't really learn it in class yet. Could someone help? I'm mostly just confused on the parts of the equation(I attached it to this problem), I think if I got that I'd understand a lot more. Thank you!

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Will you chech and finish these for me, because i am stumped with them.

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.