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skonstanty
Nov2-04, 05:12 PM
:confused: A small sculpture made of brass (density = 8470 kg/m cubed) is believed to have a secret central cavity. The weight of the sculpture in air is 15.76N. When it is submerged in water, the weight is 13.86 N. What is the volume of the secret cavity?

Tide
Nov2-04, 05:17 PM
What exactly have you tried so far?

skonstanty
Nov2-04, 05:28 PM
I have just now started

Gokul43201
Nov2-04, 05:30 PM
What property of the sculpture can you determine directly from the given data ?

skonstanty
Nov2-04, 05:31 PM
I am assuming I have to find the amount of displacement -- 15.76 - 13.86 = 1.9

skonstanty
Nov2-04, 05:32 PM
Oh, the density is = 8470

Gokul43201
Nov2-04, 05:47 PM
Recall Archimedis ?

skonstanty
Nov2-04, 05:49 PM
Fb= bouyant force = F2 - F1 = mg

rcgldr
Nov5-04, 03:26 AM
What's in the secret cavity? Air, hydrogen, nothing, or maybe the other extreme, something just a bit lighter than water, like gasoline? This has to be known in order to answer the question.

Justin Lazear
Nov5-04, 03:37 AM
If it went from being filled with air directly to being submerged in water, I'd imagine what's in the cavity is air.

Not to mention that it'd be a ridiculous question if one couldn't assume such.

--Justin