Constants Flashcards

1
Q

c

A

3 * 10^10 cm s^-1

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2
Q

h

A

6.626e-27 erg Hz^-1

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3
Q

hc

A

2 e-16 erg cm^2 g s^-1

12400 eV A

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4
Q

kb

A

1.381 e-16 erg K^-1

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5
Q

G

A

6.674e-8 g^-1 cm^3 s^-2

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6
Q

fine structure (alpha)

A

1/137

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7
Q

Bohr Radius, a0

A

0.529 A

a_0 = h_bar^2 / (m k e^2)

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8
Q

M_solar

A

2e33

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9
Q

R_solar

A

7e10 cm

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10
Q

erg to Joule

A

1 erg = 1e-7 J

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11
Q

Jansky, Jy

A

1e-23 erg s^-1 Hz^-1 cm^-2

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12
Q

eV to erg

A

1.602e-12

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13
Q

sigma (stefan boltzman)

A

5.67 e -5 erg cm^-2 K^-4 s^-1

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14
Q

e

A

5e-10

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15
Q

m_e

A

1e-27 g

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16
Q

m_p

A

2e-24 g

17
Q

pc

A

3 e 18 cm