
Gelombang Bunyi
Authored by Dina Rustiana
Science
11th Grade
Used 1+ times

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40 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Taraf intensitas suatu sumber bunyi pada jarak 9 m dari pengamat adalah 50 dB. Jika ditambah sembilan buah sumber bunyi identik yang dibunyikan bersamaan maka taraf intensitas total pada pengamat menjadi....
5 dB
40 dB
60 dB
250 dB
500 dB
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Jarak seorang pengamat A ke sumber gempa dua kali jarak pengamat B ke sumber gempa. Apabila intensitas gempa di pengamat B 8,2 x 10 4 W.m−2 , berarti intensitas gempa di A sebesar ....
2,05 . 10 4 W.m−2
4,10 . 10 4 W.m−2
8,20 .104 W.m−2
1,64 . 105 W.m−2
2,00 . 105 W.m−2
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Intensitas bunyi mesin jahit yang sedang bekerja adalah 10−9 Wm−2. Untuk intensitas ambang bunyi 10−12Wm−2, maka taraf intensitas bunyi dari 10 mesin jahit identik yang sedang bekerja adalah .....
400 dB
300 dB
40 dB
30 dB
20 dB
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Seorang penonton pada lomba balap mobil mendengar bunyi (deru mobil) yang berbeda, ketika mobil mendekat dan menjauh. Rata-rata mobil balap mengeluarkan bunyi 800 Hz. Jika kecepatan bunyi di udara 340 m.s−1 dan kecepatan mobil 20 m.s−1, maka frekuensi yang di dengar saat mobil mendekat adalah ....
805 Hz
810 Hz
815 Hz
850 Hz
875 Hz
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Taraf intensitas satu ekor lebah yang berdengung adalah 10 dB. Jika bunyi dengung masing-masing lebah dianggap identik dan intensitas ambang pendengaran manusia 10−12 Wm−2 maka intensitas bunyi dengung 1000 lebah adalah....
10−8 Wm−2
10−7 Wm−2
10−6 Wm−2
10−5 Wm−2
10−4 Wm−2
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Bunyi klakson sebuah sepeda motor saat dibunyikan menghasilkan taraf intensitas 40 dB, sedangkan bunyi klakson sebuah mobil saat dibunyikan menghasilkan taraf intensitas 60 dB. (Io = 10−12 W.m−2). Jika 100 klakson sepeda motor dan 10 klakson mobil serentak dibunyikan, maka perbandingan taraf intensitas sepeda motor dengan mobil adalah....
5 : 6
6 : 7
7 : 8
8 : 9
9 : 10
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Mobil pemadam kebakaran sedang bergerak dengan laju 20 m.s−1 sambil membunyikan sirine pada frekuensi 400 Hz (cepat rambat bunyi 300 m.s−1). Jika mobil pemadam kebakaran bergerak menjauhi seseorang yang sedang berdiri di tepi jalan, maka orang tersebut akan mendengar frekuensi sirine pada frekuensi....
375 Hz
575 Hz
600 Hz
620 Hz
725 Hz
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