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2 years ago

15

When a 440-Hz tuning fork and a piano key are struck together, five beats are heard. If the pitch of the note on the piano is lo

wer than the tuning fork, what is the frequency of the note?

2 answers:

vovangra [49]2 years ago

7 0

The frequency would also be lower

guapka [62]2 years ago

6 0

440Hz < n2
n2 - 440 = 5
n2 = 445hz

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Given :

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By equation of circular motion is given by :

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2 years ago

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1 year ago

Read 2 more answers

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aleksklad [387]

1) The buoyant force acting on an object immersed in a fluid is:
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2) We must calculate the volume of displaced fluid. Since the titanium object is completely immersed in the fluid (air), this volume corresponds to the volume of 1 Kg of titanium, whose density is $d=4.5~g/cm^3 = 4.5\cdot10^3~Kg/m^3$ . Using the relationship between density, volume and mass, we find
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3) Now we can recall the formula written at step 1) and calculate the buoyant force. The air density is $d_f = 1~Kg/m^3$ , so we have
$B=d_f V_d g=1~Kg/m^3 \cdot 2.22\cdot10^{-4}~m^3 \cdot 9.81~m/s^2=2.22\cdot10^{-3}~N$

4) The weight of 1 Kg of titanium is instead:
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So, the buoyant force is negligible compared to the weight.

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1 year ago