October 2018 2 17 Report
Sebuah batu di jatuhkn ke dalam sumur yg dalamnya 17 cm.apabila cepat rmbt bunyi di udra adlah 340m/s mak selang wktu yg d butuh kn untk mndngr bubyi pantulan btu mngenai dasar sumur adlah
a.0,05 sekon
b.0,10 sekon
c.0,20 sekon
d.0,34 sekon

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