Which of the following statements concerning the nuclear force is false? o the nuclear force is attractive and not repulsive. o the nuclear is one of only four known types of forces in nature. o the nuclear force is very short-ranged. o the nuclear force acts on both protons and neutrons. o the nuclear force is very weak and much smaller in relative magnitude than the electrostatic and gravitational forces. submit request

The nuclear force is attractive and not repulsive.The nuclear force is very weak and much smaller in relative magnitude than the electrostatic and gravitational forces.

Explanation:

Nuclear force is the strongest existing force in the nature. It has the shortest range.Its main function is to hold the subatomic particles together in nature.The nuclear force is created  by the exchange of pi mesons between the nucleons of an atom, but for this exchange to happen the particles must be close to one another of the order of few femtometer.At about 1 femtometer the nuclear force is very strongly attractive in nature but at distance greater than 2.5 femtometer it fades away. The force becomes repulsive in nature at distance less than 0.7 femtometer.This force holds the likely charged protons together in the nucleus.

Efficiency is an action of doing something. for example when you take a test. good efficiency means you did well but bad effeciency or no effiency means you did bad.