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Newtonian mechanics

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7 KONSTANTER 25<br />

7 Konstanter<br />

Grundlæggende fysiske konstanter<br />

Sym. Værdi Enhed<br />

Gravitationskonstanten G 6.668·10 −11 Nm 2 kg −2<br />

Tyngdeaccelerationen nær Jorden g 9.8 ms −2<br />

Tyngdeaccelerationen ved Ækvator g 9.78 ms −2<br />

Tyngdeaccelerationen nær polerne g 9.83 ms −2<br />

Masse af<br />

Jorden MA 5.976 · 10 24 kg<br />

M˚anen 7.35 · 10 22 kg<br />

Mars 6.42 · 10 23 kg<br />

Venus 4.89 · 10 24 kg<br />

Jupiter 1.90 · 10 27 kg<br />

Saturn 5.69 · 10 26 kg<br />

Solen M⊙ 1.989 · 10 30 kg<br />

Middelradius<br />

Jorden RA 6.378 · 10 6 m<br />

M˚anen 1.73 · 10 6 m<br />

Mars 3.39 · 10 6 m<br />

Jupiter 7.13 · 10 7 m<br />

Solen R⊙ 6.96 · 10 8 m<br />

Middelbaneradius<br />

Jorden (1 AU) 1.495 · 10 11 m<br />

M˚anen (om Jorden) 3.84 · 10 8 m<br />

Mars 1.52 AU<br />

Venus 0.72 AU<br />

Jupiter 5.20 AU<br />

Banetid<br />

Jorden (1 ˚ar) 3.16 · 10 7 s<br />

M˚anen (27.32 dage om Jorden) 2.36 · 10 6 s<br />

Mars (687 dage) 5.94 · 10 6 s<br />

Rotationstid<br />

(ift. heliocentrisk ramme)<br />

Jorden (23 t 56 min) TA 8.62 · 10 4 s<br />

Solen (25.38 dage) T⊙ 25.38 dage<br />

Atomenheder<br />

Elektronmasse me 9.1093897 · 10 −31 kg<br />

Protonmasse mp 1.6726231 · 10 −27 kg<br />

Neutronmasse mn 1.674954 · 10 −27 kg<br />

Elementarladningen e 1.60217733 · 10 −19 C<br />

Lysets hastighed i vakuum c 2.998 · 10 8 ms − 1<br />

Lys˚ar lj 9.4605 · 10 15 m

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