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Marizza181 [45]
3 years ago
12

Why can you hear a man's voice around the corner of a building even if you can't see him?

Physics
1 answer:
OverLord2011 [107]3 years ago
4 0

Answer:

Diffraction

Explanation:

the sound bounces off the corner and we are able to hear it

A P E X

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The front and rear sprockets on a bicycle have radii of 8.40 and 4.91 cm, respectively. The angular speed of the front sprocket
Rudik [331]

Explanation:

It is given that,

Radius of the front sprockets, r_f=8.4\ cm=0.084\ m

Radius of the rear sprockets, r_r=4.91\ cm=0.0491\ m

The angular speed of the front sprocket is 12.3 rad/s, \omega_f=12.3\ rad/s

(a) Linear speed of the front sprockets, v_f=r_f\times \omega

v_f=0.084\times 12.3    

v_f=1.0332\ m/s

v_f=103.32\ cm/s

Linear speed of the rear sprockets, v_r=r_r\times \omega

v_r=0.0491\times 12.3    

v_r=0.60393\ m/s

v_r=60.393\ cm/s

(b) Let a_r is the centripetal acceleration of the chain as it passes around the rear sprocket.

a_r=\dfrac{v_r^2}{r_r}

a_r=\dfrac{(60.393)^2}{0.0491}

a_r=74283.39\ m/s^2

a_r=7428339\ cm/s^2

`Hence, this is the required solution.

8 0
3 years ago
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Dx= 7.14m and Dy = -7.55m<br> What is the direction and magnitude of the vector
KengaRu [80]

The Magnitude of the Vector is 10.39m and the direction of the vector is - 46.7°.

<u>Explanation:</u>

GIven dx=7.14m and dy= -7.55m,

The Magnitude of the Vector=\sqrt{dy^{2} +dx^{2} }

Magnitude d= \sqrt{(7.14)^{2} +(-7.55)^{2} } .

                  d=\sqrt{50.97+57}

                  d=\sqrt{107.98}

                  d= 10.39m.

Direction Ф = tan^{-1}\frac{dy}{dx}

                      =tan^{-1} \frac{-7.55}{7.14}      

                      = tan^{-1}(-1.06)

                Ф    = - 46.7°.

5 0
3 years ago
A 1 mF, a 2 mF, and a 3 mF capacitor are connected in parallel, the combination being
Aleonysh [2.5K]

Answer:

a) the greatest charge will be on C3=3 mF

b) Voltage will be same across each capacitors

Explanation:

Given: C1 = 1 mF, C2 =2 mF, C3 = 3 mf and V= 9 volts

To Find: greatest charge Q=? and which capacitor has the greatest voltage=?

Solution:

a)  

As the voltage across each will be same so  (using Q = C V)

Q1 =  1 mF × V

Q2 = 2 mF × V

Q3 = 3 mF × V

so the greatest charge will be on C3=3 mF

b) Voltage will be same across each capacitors

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4 years ago
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What is the period of a pendulum?
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D. The period is a measure of how much time it takes for the bob to go back and forth once.
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