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N76 [4]
3 years ago
9

How many centimeters are in 50 feet?

Physics
1 answer:
Rainbow [258]3 years ago
7 0
1,524 centimeters are in 50 feet!
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A ball is tied to the end of a cable of negligible mass. The ball is spun in a circle with a radius 2.00 m making 0.700 revoluti
Ira Lisetskai [31]
1) find speed (8.8 m/s)
2) find acceleration (38.7 m/s^2)
answer is about 38.7 m/s^2

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3 years ago
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A pipe that is open at both ends has a fundamental frequency of 320 Hz when the speed of sound in air is 331 m/s.
fenix001 [56]

Question

What is the length of the pipe?

Answer:

(a) 0.52m

(b) f2=640 Hz and f3=960 Hz

(c) 352.9 Hz

Explanation:

For an open pipe,  the velocity is given by

v=\frac {2Lf}{n}

Making L the subject then

L=\frac {nV}{2f}

Where f is the frequency,  L is the length,  n is harmonic number,  v is velocity

Substituting 1 for n,  320 Hz for f and 331 m/s for v then

L=\frac {1*331}{2*320}=0.5171875\approx 0.52m

(b)

The next two harmonics is given by

f2=2fi

f3=3fi

f2=3*320=640 Hz

f3=3*320=960 Hz

Alternatively, f2=2\times \frac {v}{2L} and f3=3\times \frac {v}{2L}

f2=2\times \frac {331}{2*0.52}=636.5 Hz\\f3=3\times \frac {331}{2*0.52}=954.8 Hz

(c)

When v=367 m/s then

f1= \frac {v}{2L}\\f1= \frac {367}{2*0.52}=352.9 Hz

5 0
3 years ago
I give a ball a push on an acclivity. The "start velocity" is on 7m/s. The time it took the ball to get back to me was 10 second
Degger [83]

Answer:

7÷10

Explanation:

initial velocity=7m/s

final velocity=0m/s

3 0
4 years ago
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Which formula is used to calculate average velocity?
egoroff_w [7]

Average velocity is the change in distance divided by the time it takes to travel that distance. so the first one.

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3 years ago
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An object is approaching you while making a sound.
zvonat [6]

The pitch of the sound is perceived to be lower when an object is approaching you while making a sound.

<h3>What is sound?</h3>

Sound is a type of vibration capable of propagating in a suitable media (e.g., air or water).

The sound waves are called acoustic waves and they have a well-defined frequency and amplitude.

In conclusion, the pitch of the sound is perceived to be lower when an object is approaching you while making a sound.

Learn more about sound waves here:

brainly.com/question/1199084

#SPJ1

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