Jawabanmu

2014-04-04T20:10:33+07:00
Ρ air . g. Vair = ρ balok . g .Vblok
1. 1000 . (20%.) = ρb . 1000 . 100%
200 = 1000ρbalok
ρbalok = 200/1000
= 0,2 g/cm3
*jika g = 10 m/s2. jika 9,8 m/s. 1000 m/s2 dpt dgnti dgn 980 m/s2
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