Buoyant force and Archimedes’ principle how to solve this equation please ?
A solid block is suspended from a spring scale. If the reading on the
Scale when the block is completely immersed in water is 34.0 N, and the reading when it is completely immersed in alcohol of density 806 kg /m3 is 34.7 N, what are the block’s volume and density?
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rho_block g V - rho_water g V = 34.0 N
rho_block g V - rho_alc g V = 34.7 N
Subtract the first equation from the second:
(Rho_water - rho_alc) g V = 0.7N
This gives you V. Using this V in either of the two equations gives you rho_block.