Which volcanoes on pasific ring of fire are familiar to you

Chemistry

1 answer:

REY [17]3 years ago

8 0

Answer:

The country has a record of some of the most deadly volcanic eruptions in history, and right now there are ongoing eruptions at the Agung, Sinabung and Dukono volcanoes. But other volcanoes in the region are active too, including Kadovar in Papua New Guinea, Mayon in the Philippines, and Kusatsu-Shiranesan in Japan.

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Find the ratio v/cv/c for an electron in the first excited state (n = 2) of hydrogen.

dezoksy [38]

The answer is 0.365:100.

v/c ratio represents ratio of speed of an electron (v) to the speed of light (c).

How is the speed of an electron calculated?

The speed of an electron (v) is given by Bohr's model as-

$v =\frac{1}{n}\; \frac{e^{2}}{4\pi \varepsilon _{0}}\times \frac{2\pi }{h}$

Now, for the first excited state, n = 2.

e - Charge of electron = $1.6$ × $10^{-19}$ C

h - Plank's constant = $6.6$ × $10^{-34} J.s$

ε₀- permittivity $= 8.85$ × $10^{-12}$ $N^{-1}.C^{2}.m^{-2}$

Put the above data in the formula-

$v =\frac{1}{2}\; \frac{e^{2}}{4\pi \varepsilon _{0}}\times \frac{2\pi }{h} =\frac{1}{4}\times \frac{(1.6\times 10^{-19})^{2}}{8.85\times 10^{-12}\times 6.6\times 10^{-34}}\\ \\ =0.01096\times 10^{8} \\ \\=1.096\times 10^{6}ms^{-1}$