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r-ruslan [8.4K]
3 years ago
11

Which medium below conducts sound the fastest?

Physics
2 answers:
kumpel [21]3 years ago
4 0

Which medium below conducts sound the fastest?

A. a wall

<u>B. Steel </u>

C. Plastic

D. Cardboard​

Karo-lina-s [1.5K]3 years ago
4 0
B. STEEL

Is the answer

Have a nice day <3
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Violet light of wavelength 400 nm ejects electrons with a maximum kinetic energy of 0.860 eV from sodium metal. What is the bind
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Answer:

Binding Energy = 2.24 eV

Explanation:

First, we need to find the energy of the photon of light:

E = hc/λ

where,

E = Energy of Photon = ?

h = Plank's Constant = 6.626 x 10⁻³⁴ J.s

c = speed of light = 3 x 10⁸ m/s

λ = wavelength of light = 400 nm = 4 x 10⁻⁷ m

Therefore,

E = (6.626 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(4 x 10⁻⁷ m)

E = (4.97 x 10⁻¹⁹ J)(1 eV/1.6 x 10⁻¹⁹ J)

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Binding Energy = E - Kinetic Energy

Binding Energy = 3.1 eV - 0.86 eV

<u>Binding Energy = 2.24 eV</u>

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