Do you know magnets? Magnet questions

[CRW Reef]

Im sure Google can answer this question but thought others might want to know also.

So can you use a smaller/weaker magnet on inside of glass and a larger/stronger on the outside of glass; resulting in a stronger magnetism than just using the smaller ones? Or...will the magnetism strength only be as strong as the smaller of the two?

 

[SkyDiv3r17]

Just thinking out loud here but whether the large magnet is connected to a metal pipe or a small magnet, the force of the magnetism should be the same.

Could be wrong I guess though.

EDIT: just asked my roommate whose a mechanical engineer. He says whether you have two small magnets on opposite sides of a pane of glass, or that same size small magnet and a large magnet, the force they apply on the glass will be the same in both cases.

 

[Ambrosio Aquatics]

yes. you dont even need 2 magnets technically. you can use a coated/waterproof piece of magnetic material inside and magnet out or vice versa. also you can use weaker magnets stacked to create a stronger pull force

 

[Balz3352]

Multiple magnets increase strength. Like nick said technically you don't even need 2 magnets you could suffice with one strong magnet and a piece of metal (or other magnet friendly piece)