maxmara红色羊绒大衣:四大自然力是哪几种？

重力 电磁力 强核力 弱核力

Gravity(重力) describes the attractive force of matter. It is the same force that holds planets and moons in their orbits and keeps our feet on the ground. It is the weakest force of the four by many orders of magnitude.

Electromagnetism(电磁力) describes how electricity and magnetic fields work. It also makes objects solid. Once believed to be two separate forces, it was discovered both could be described by a simple set of equations.

The strong nuclear force(强核力) is responsible for holding the nucleus of atoms together. Without this force, protons would repel one another so no elements other than hydrogen - which has only one proton - would be able to form.

The weak nuclear force(弱核力) explains beta decay and the associated radioactivity. It also describes how elementary particles can change into other particles with different energies and masses.

风力，电力，热力，引力

万有引力，电磁力，强力，弱力

万有引力、电磁力、强相互作用、弱相互作用

1、2、9楼的都太有个性了 佩服！！

9楼太搞笑！ 强力>电磁力>弱力>万有引力