3 years ago

1. Which of the following is not an example of friction?

Physics

1 answer:

mario62 [17]3 years ago

8 0

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What is the length of a one-dimensional box in which an electron in the n=1 state has the same energy as a photon with a wavelen

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Answer:

Length will be 0.491 nm

Explanation:

We have given wavelength of the photon $\lambda =800nm=800\times 10^{-9}m$

Plank's constant $h=6.6\times 10^{-34}J-s$

We know that energy of the photon is given by

$E=\frac{hc}{\lambda }=\frac{6.6\times 10^{-34}\times 3\times 10^8}{800\times \times 10^{-9}}=2.475\times 10^{-19}J$

We know that energy of photon is also given by

$E=\frac{n^2h^2}{8mL^2}=\frac{h^2}{8mL^2}$

$2.475\times 10^{-19}=\frac{(6.6\times 10^{-34})^2}{8\times 9.1\times 10^{-31}\times L^2}$

$L=0.491\times 10^{-9}m$

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3 years ago

A 1.0 m length of metal wire is connected to a battery, and a current of flows through it. What is the diameter of the wire? The

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Which best describes what forms in nuclear fission?A. two smaller, more stable nucleiB. two larger, less stable nucleiC. one sma

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Answer:B. two larger, less stable nuclei

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Answer:

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