A mass is attached to a spring vertically. In air, it is distended 15cm from its normal rest point. Once immersed in a fluid, it is distended 20cm from its rest point. What is the density of the fluid?

Question

chillout · Answer

Relative to air, that is.

chillout · Answer

@bahrom7893, could you helpe me, please? :D

chillout · Answer

Sorry for asking, though.

chillout · Answer

All right. Thanks anyways.

bahrom7893 · Answer

@whpalmer4

whpalmer4 · Answer

the mass is hanging from the spring?  and when hanging in liquid instead of air, it hangs lower?!

chillout · Answer

Yes

chillout · Answer

Sry, was afk for a bit.

chillout · Answer

attachment

whpalmer4 · Answer

The only way that I could see that happening is if the buoyancy in the liquid is less than in air which implies the liquid is less dense than air.

whpalmer4 · Answer

I can't find any such liquids, though.

chillout · Answer

It's not a numerical problem, there are no values, just the heights. The answer says it is 1.5x air density

whpalmer4 · Answer

greater density of the fluid -> greater buoyancy for the weight.  I'm not convinced...

chillout · Answer

Well, I do not have it in hand right now, but I can find it, give me a moment.

whpalmer4 · Answer

I'm not going to lose any sleep over it :-)

chillout · Answer

I can't find it for now... I guess my question is not 100% right... Later I'll bump it again.

whpalmer4 · Answer

I'll get a notification if you post again on the thread, and will take a look.