When was science a thing

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.

Explain why electric current cannot exist if a current doesn't have a voltage source.