October 2018 1 31 Report
Balon udara mempunyai massa 400 kg diisi 1000 m3 udara panas dengan massa jenis 0,8 kg/m3. sementara itu, massa jenis udara di sekitarnya 1,3 kg/m3. jika percepatan gravitasi 9,8 m/s2, gaya angkat balon udara sebesar... N

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