September 2018 1 2K Report
Apakah reaksi" di bawah ini termasuk reaksi redoks?
a. 2HCI +Zn -----> ZnCI2 + H2
b. PbO2 + 2H2SO4 +Pb ----> 2PbSO4 + 2H2O
c. AgNO3 + NaCI -------> AgCI + NaNO3
d. MnO2 + 4HCI ----> MnCI2 +CI2 + 2H2O
e. PbO + H2SO4 ----> PbSO4 + H2O

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Sebuah pegas di gantungi beban bermasa 50 g. Saat digetarkan dapat terjadi getaran dengan frekuensin 36 hz. Frekuensi ertarannya jika bebannya diganti dengan benda bermassa 200 g adalah...
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