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ozzi
3 years ago
9

A glass tube (open at both ends) of length L is positioned near an audio speaker of frequency f = 770 Hz. For what values of L w

ill the tube resonate with the speaker? (Assume that the speed of sound in air is 343 m/s.) m (lowest possible value) m (second lowest possible value) m (third lowest possible value)
Physics
1 answer:
Schach [20]3 years ago
4 0

Answer:

- The lowest possible value of the length L1 = 0.45/2

L1 = 0.225m

- Second lowest possible value

L2 = 0.45m

- Third lowest possible value

L3 = 3(0.45)/2

L3 = 0.675m

Explanation:

Before calculating the length of the resonance tube, we need to know the wavelength produced by the wave.

Using the expression

v = Foλ

V is the velocity of wave

Fo is the resonance frequency

λ is the wavelength

From the formula

λ = v/Fo

λ = 343/770

λ = 0.45m

For an open pipe, the first resonant length L1 = λ/2

Second resonant length L2= λ

Third resonant length L3 = 3λ/2

The lowest possible value of the length L1 = 0.45/2

L1 = 0.225m

Second lowest possible value

L2 = 0.45m

Third lowest possible value

L3 = 3(0.45)/2

L3 = 0.675m

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A truck on a straight road starts from rest, accelerating at 2.00m/s^2 until it reaches a speed of 20.0m/s. Then the truck trave
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Answer:

Explanation:

a )

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Distance travelled in last 5 s .

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Bill leaves his 60 W desk lamp on every day, including weekends, for eight hours. After one month (30 days), how much total ener
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That's all the physics we need to know to answer this question.
The rest is just arithmetic.

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= (60 · 30 · 8 · 3600) (joule · day · hour · sec) / (sec · day · hour)

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__________________________________

Wait a minute !  Hold up !  Hee haw !  Whoa ! 
Excuse me.  That will never do.
I see they want the answer in units of kilowatt-hours (kWh).
In that case, it's

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Rounded to the nearest whole number:

14 kWh

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