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dimaraw [331]
3 years ago
11

A 100 hz sound wave is traveling through the air. if we increase the frequency to 200 hz, this will _____ the wavelength. a 100

hz sound wave is traveling through the air. if we increase the frequency to 200 hz, this will _____ the wavelength. increase decrease not change
Physics
1 answer:
yanalaym [24]3 years ago
4 0
The correct answer is "decrease":
<span>A 100 hz sound wave is traveling through the air. if we increase the frequency to 200 hz, this will INCREASE the wavelength.

Let's see why. The basic relationship between frequency and wavelength of a wave is
</span>\lambda= \frac{v}{f}
<span>where
v is the speed of the wave
f its frequency
</span>\lambda its wavelength
<span>
We can see from this equation that, if the frequency is increased, if the speed of the wave does not change (and this is the case), then the wavelength of the wave must decrease, since the ratio </span>\frac{v}{f} becomes smaller.
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Which is an example of current electricity
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Use your knowledge of waves and the graph shown to determine the frequency of wave C. What does it tell you about speed of the w
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2 years ago
(a) The electric potential due to a point charge is given by V = kq⁄r where q is the charge, r is the distance from q and k = 8.
LiRa [457]

Answer:

a)  [volts] = [N m / C],

b) The lines or surface that has the same potential are called equipotential

c) the equipotential lines must also be perpendicular to the electric field lines

Explanation:

a) find the units of the volt

the electric potential energy is

             V = k q / r

             V = [N m² / C²] C / m

              V = [N m / C]

The electric potential is defined as

             V = E .s

             V = [N / C] [m]

             V = [N m / C] = [volt]

we see that in the two expressions the same result is obtained therefore the volt is

            [volts] = [N m / C]

b) The lines or surface that has the same potential are called equipotential surfaces, the great utility of these lines or surfaces is that a face can be displaced on it without doing work.

c) The electric potential is defined as the gradient of the electric field

             v =  - \frac{dE}{dx} i^

therefore the equipotential lines must also be perpendicular to the electric field lines

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