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wolverine [178]
3 years ago
11

In the classical view of the atom, Bohr pictured electrons orbiting the positively charged nucleus similar to how the planets or

bit the Sun. While this picture was not entirely correct, it provides a good framework in which to make calculations about the energies of electrons. Different from the predictions of Newtonian mechanics, which allows any energy to be possible, Bohr described the electron orbits (now called orbitals) as having specific energies. Rank the following electron energy states according to their electron energies.
Rank from highest to lowest energies.
- first excited state- ground state
- third excited state
- second excited state
Physics
1 answer:
stiks02 [169]3 years ago
3 0

Answer:

The energetic order third excited > seconds excited > first excited > ground

Explanation:

Bohr's atomic model includes an integer that is responsible for the quantization of energy

       E = - 13.6 /n²  eV

Where n is the so-called principal quantum number, it is an integer with values ​​of

     n = 1, 2, 3… inf

For n = 1 have the so-called ground state that is the one with the lowest energy, for the minus sign in the formula E1 = -13.6 eV

For n = 2 it is the first excited state has the most energy than the ground state,

E2 = 13.6 / 4 = -3.4eV

For n = 3 we have the second excited state, E3 = -13.6 / 9 = -1.5 eV

For n = 4 we have the third excited state, E4 = -0.85 eV

The energetic order of the states is

E4 > E3 > E2 >E1

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The third floor of a house is 8m above street level. How much work is needed to move a 136kg refrigerator to the third floor?
jonny [76]

m = Mass of the refrigerator to be moved to third floor = 136 kg

g = Acceleration due to gravity by earth on the refrigerator being moved = 9.8 m/s²

h = Height to which the refrigerator is moved  = 8 m

W = Work done in lifting the object

Work done in lifting the object is same as the gravitational potential energy gained by the refrigerator. hence

Work done = Gravitation potential energy of refrigerator

W = m g h

inserting the values

W = (136) (9.8) (8)

W = 10662.4 J



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jenyasd209 [6]

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aleksandrvk [35]

Answer:

θ= 5 radian

Explanation:

Given data:

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8 0
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Answer:

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Since we know the absorption spectrum for elements like hydrogen, we can look for these absorption lines in the star's spectra and figure out what direction these lines are shifted and tell if the star is moving away or towards us

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kakasveta [241]

Answer:

No

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