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rjkz [21]
3 years ago
11

Find 5 things people do when they are happy

Physics
1 answer:
Degger [83]3 years ago
8 0
Go for a walk
Out to eat
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The main factors that determine the speed of a wave in any particular medium are _____.
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It all depends on what kind of wave, and what kind of medium.

For mechanical waves, like sound and earthquakes, the speed
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For electromagnetic waves, like radio and light, the speed is
determined by the electrical properties of the medium, like
magnetic permeability and electrostatic permittivity.

That's a big part of the reason why sound and light travel
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On what factors, current sensitivity voltage sensitivity of<br>a galvanometer depend?<br>​
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<h3> it depends on numbers of turns coils area restoring force per unit twist and magnetic fields</h3><h2 /><h2 /><h2>hope it helps</h2>

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Reflection happens when a wave __________ .
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The answer is C. I just took the test. 

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First to answer will be marked brainliest :p
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Light with a wavelength of 395 nm illuminates a metal cathode. The maximum kinetic energy of the emitted electrons is 0.76 eV .
lutik1710 [3]

Answer:

520.8 nm

Explanation:

We are given that

\lambda=395 nm=395\times 10^{-9} m

1 nm=10^{-9} m

Maximum kinetic energy,K_{max}=0.76 eV=0.76\times 1.6\times 10^{-19} V

1 e=1.6\times 10^{-19} C

We have to find the maximum wavelength of light.

We know that

h\nu=\frac{hc}{\lambda_0}+K_{max}

Where c=3\times 10^8 m/s

h=6.625\times 10^{-34}

6.625\times 10^{-34}\times \frac{3\times 10^8}{395\times 10^{-9}}=\frac{6.625\times 10^{-34}\times 3\times 10^8}{\lambda_0}+0.76\times 1.6\times10^{-19}

6.625\times 10^{-34}\times \frac{3\times 10^8}{395\times 10^{-9}}- 0.76\times 1.6\times10^{-19}=\frac{6.625\times 10^{-34}\times 3\times 10^8}{\lambda_0}

\lambda_0=\frac{6.625\times 10^{-34}\times 3\times 10^8}{6.625\times 10^{-34}\times \frac{3\times 10^8}{395\times 10^{-9}}- 0.76\times 1.6\times10^{-19}}

\lambda_0=5.208\times 10^{-7} m=520.8 nm

6 0
3 years ago
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