physics 2 exam 4!!

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13 Terms

1
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“near point”??

= do

2
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what is the value we can assume (di)

di = 0.02 m

3
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units of P (power)??

D

4
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what equation gives us E from wavelength???

E = hc/ λ

5
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what unit should the mass (m) be in equations?

kg!

6
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units of frequency (f)?

Hertz

7
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what is λ of ___ line in series….

1/λ = Z2R (1/nf2 - 1/ni2)

8
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Balmer Line

nf = always 2

1st: ni= 3

2nd: ni = 4

3rd: ni = 5

9
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Lyman line

nf = always 1

1st: ni = 2

2nd: ni = 3

5th: ni = 6

10
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radius of nucleus??? (fm= 10-15)

R= Z1/3 × 1.2 fm

11
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convert from mass to energy!

use E=mc2, answer will be in Joules initially

12
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1 u = ____ MeV

1u = 931.5 MeV

13
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1 u = ____ kg

1 u = 1.6605 × 10-27 kg