Diketahui:

<img align="middle" alt="begin mathsize 14px style lambda equals 20 space straight m
f equals 6 space Hz end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi»§#955;«/mi»«mo»=«/mo»«mn»20«/mn»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»m«/mi»«mspace linebreak=¨newline¨/»«mi»f«/mi»«mo»=«/mo»«mn»6«/mn»«mo»§#160;«/mo»«mi»Hz«/mi»«/mrow»«/mstyle»«/math»" height="33" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -19px;" width="61" />

Ditanyakan:&nbsp;cepat rambat gelombang (v)?

Jawab:

<img align="middle" alt="begin mathsize 14px style v equals lambda times f
v equals 20 times 6
v equals 120 space straight m divided by straight s end style" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mstyle mathsize=¨14px¨»«mrow»«mi»v«/mi»«mo»=«/mo»«mi»§#955;«/mi»«mo»§#183;«/mo»«mi»f«/mi»«mspace linebreak=¨newline¨/»«mi»v«/mi»«mo»=«/mo»«mn»20«/mn»«mo»§#183;«/mo»«mn»6«/mn»«mspace linebreak=¨newline¨/»«mi»v«/mi»«mo»=«/mo»«mn»120«/mn»«mo»§#160;«/mo»«mi mathvariant=¨normal¨»m«/mi»«mo»/«/mo»«mi mathvariant=¨normal¨»s«/mi»«/mrow»«/mstyle»«/math»" height="52" role="math" src="data:image/png;base64,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" style="max-width: none; vertical-align: -27px;" width="85" />

Jadi, cepat rambat gelombangnya adalah 120 m/s.

Hitunglah cepat rambat gelombang jika frekuensi 6 Hz dan panjang gelombangnya 20 m!<img align="middle" alt="undefined" class="Wirisformula" data-mathml="«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mo»§#160;«/mo»«/math»" height="5" role="math" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAFCAYAAABirU3bAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAABGJhU0UAAAAEx0lWhwAAAAxJREFUeNpjYKABAAAAVQAB8vOvGAAAAE50RVh0TWF0aE1MADxtYXRoIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8xOTk4L01hdGgvTWF0aE1MIj48bW8+JiN4QTA7PC9tbz48L21hdGg+SHplFQAAAABJRU5ErkJggg==" style="max-width: none; vertical-align: -1px;" width="4" />

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Hitunglah cepat rambat gelombang jika frekuensi 6 ...

Jawaban: