Page 257 - ASTRONOMI DAN ASTROFISIKA

Tetapan matematika
bilangan natural e = 2,718 281 828 5
pi  = 3,141 592 653 6
1 radian rad = 57°,295 779 5
= 3437’,746 77
= 206 264”,806

KONVERSI BESARAN

1 erg = 10 J
-7
1 W = 1 Js -1
1 J = 1 kg m s
2 -2
1 cm = 10 m
-2
1 g = 10 kg
-3
1 dyne = 10 N
-5
tan (θ<<) = θ/57,29
1 = 15°
h
m
= 60
= 3 600 s
1 eV = 1,602 07 . 10 J
-19
1 sma = 1,66 . 10 kg
-27
= 931 MeV
= 1,491 . 10 J
-10
1 Tesla (T) = 10 000 gauss
1 Angstrom (Å) = 10 m
-10
radius Bohr = 5,29 . 10 m
-11
T Kelvin = (T + 273) ºCelcius

Astronomi dan Astrofisika 256