Numbers Flashcards

1
Q

c

A

3e8 m/s

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2
Q

kB

A

1.4e-23 J/K

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3
Q

1 eV

A

1.6e-19 J

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4
Q

N_Avo

A

6e23

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5
Q

h

A

6.63e-34 J*s

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6
Q

hbar

A

1e-34 J*s

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7
Q

G

A

6.67e-11 N*m^2/kg^2

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8
Q

e

A

1.6e-19 C

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9
Q

m_electron

A

9.11e-31 kg

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10
Q

m_proton

A

1.7e-27 kg

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11
Q

1 kcal

A

4,200 J

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12
Q

1 amu

A

1.7e-27 kg

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13
Q

kB*T at room temp

A

1/40 * eV

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14
Q

1 inch

A

2.54 cm

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15
Q

radius earth

A

6.4e6 m

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16
Q

radius moon

A

1.7e6 m

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17
Q

radius sun

A

7e8 m

18
Q

Cs hyperfine freq

A

9 GHz

19
Q

Sr clock frequency

A

430 THz

20
Q

eps_0

A

8.9e-12 C^2/N m^2

21
Q

mu_0

A

4 pi e-7 T m/A

22
Q

Stefan Boltzmann Constant

A

5.7e-8 W/m^2K^4

23
Q

b : Wien Displacement constant

A

59 GHz/K

24
Q

H_0 : Hubble constant

A

69.3 (km/s)/Mpc

25
Q

Mpc : Megaparsec

A

3.1e19 km

26
Q

Bohr radius

A

.5 angstrom

27
Q

Height of everest

A

9 km

28
Q

Elevation Duane

A

1.64 km

29
Q

Circumference earth

A

40,000 km

30
Q

alpha

A

1/137

31
Q

mu_B (Bohr magneton)

A

14 GHz/T

32
Q

Gauss to T

A

1 G = 0.1 mT

33
Q

mu_N (Nuclear Magneton)

A

8 MHz/T

34
Q

1 Ry

A

13.6 eV

35
Q

pi

A

3.14

36
Q

size nucleus

A

10 fm

37
Q

speed sound in air

A

340 m/s

38
Q

density water

A

1 g/cm^3

39
Q

1 kW*hr in dollars

A

10 cents

40
Q

air molecule speed room temp

A

500 m/s

41
Q

energy covalent bond

A

few eV (6.3 for carbon)