Question

a density bottle weighs 0.25N when empty,and 0.75N when filled with water and 0.65N when filled with alcohol.
(i)Find the volume of the empty bottle
(i) The density of the alchohol. Density of water =1000kg/m
Acceleration due to gravity= 10ms
(i) weight of water ... 0.75 N - 0.25 N = 0.50 N

mass of water = weight of water / g = 0.50 N / 10 = 0.05 kg = 50 g

volume of water is ... 1 cm^3 per g


(ii) alcohol density = water density * [(0.65 - 0.25) / (0.75 - 0.25)]
It was not well understood
I don't get it.

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