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Deffense [45]
3 years ago
9

A wave has a wave length of 20mm and a frequency of 5 hertz. What is the speed?

Physics
2 answers:
zmey [24]3 years ago
7 0

Speed = (wavelength) x (frequency

Speed = (.020 m) x (5 / sec)

Speed = 0.1 m/s
Verizon [17]3 years ago
5 0
100 mm/s one hundred millimeters per second
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Does sound travel much faster than light ?
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Fy = 14.3 [N]

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When we have the components on the horizontal and vertical axes we must use the Pythagorean theorem.

F = \sqrt{F_{x}^{2} +F_{y}^{2}  }

where:

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Fx = horizontal component = 4.5 [N]

Fy = vertical component [N]

15=\sqrt{4.5^{2}+F_{y}^{2}}\\ 15^{2}= (\sqrt{4.5^{2}+F_{y}^{2}})^{2} \\225 = 4.5^{2}+F_{y} ^{2}\\  F_{y}^{2} =225 -4.5^{2}\\ F_{y}^{2}=204.75\\F_{y}=\sqrt{204.75}\\  F_{y}=14.3 [N]

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