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Tekanan udara: = 76 cmHg - (h/100 . 1 cmHg)
= 76 cmHg - (150/100 . 1 cmHg)
= 76 cmHg - 1,5 cmHg
= 74,5 cmHg (Jawabannya C)
14. Rumusnya :P1.V1 = P2.V2
Maka
>>50atm.30l = 2atm.V2
>>1500atm.l/2atm = V2
>>V2 = 750 liter (Jawabannya B)
15. massa jenis air / ρ = 1g/cm3 (dijadiin kg/m3) = 1000kg/m3
g =10m/s2
h = 70cm-20cm = 50cm (terhadap permukaan) = 0,05m
Rumusnya :
=ρ. g. h
=1000kg.m3. 10m/s2. 0,05m
=5000N/m2 (Jawabannya C)