Answer: the water level would rise since the pebble displaces minimal water compared to the boat.
Explanation:..........
What a sloppy question ! The purpose of a fuse or circuit breaker is to shut down the circuit when current reaches a magnitude indicating danger due to a serious malfunction. When current IS flowing in the circuit, it's always flowing at the same speed.
Generally, the nucleus of an atom has a positive CHARGE because of the protons (not sure what you mean by nature) which helps attract the electrons the nucleus but it stays within it's electron cloud.
It cannot have the same charges as electrons (being negative) as the electrons would be repelled and the atom would lose it's structure.
I hope this answers the question.