Question

A piece of brass of volume 40 cm3 has a mass of 265 g. Find the density of brass in the SI unit.

Answer 1

Explanation:

mass M of the piece of brass = 252 g Volume of the piece of volume = 30\ cm^330 cm3

(i) density d = \frac{M}{V}VM

= \frac{252}{30}=8.4\ g\ cm^{-3}30252=8.4 g cm−3

since, M = 252g = 0.252 kg

V = 30\ cm^330 cm3

= 30\times10^{-6}\ m^{-3}30×10−6 m−3

Density d = \frac{0.252\ kg}{30\times10^{-6}\ m^{-3}}=\frac{0.252\ kg}{30\times\frac{1}{1000000}m^{-3}}30×10−6 m−30.252 kg=30×10000001m−30.252 kg

=

\frac{0.252\times1000000\ kg}{30\ m^3}=\frac{25200}{3}kg\ m^{-3}\ =\ 8400\ kg\ m^{-3}30 m30.252×1000000 kg=325200kg m−3 = 8400 kg m−3

Answer 2

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