Aidez moi en physique à juste une toute petite question : il faut convertir= 1 ua (unité astromique) = .......km 5,2 ua = ..... cm 1,5 ua=......cm 0,4 ua=.....c

Bonjour

1 ua = 149 600 000 km = 1.496 x 10^8 km

On sait que 1 km = 10^5 cm
 
5.2 ua = 5.2 x 1,496 x 10^8 = 7,779 2 x 10^8 km
= 7.779 2 x 10^8 x 10^5 = 7,779 2 x 10^13 cm

1.5 ua = 1.5 x 1,496 x 10^8 = 2,244 x 10^8 km
= 2.244 x 10^8 x 10^5 = 2.244 x 10^13 cm

0.4 ua = 0.4 x 1,496 x 10^8 = 0.598 4 x 10^8 = 5.984 x 10^7 km
= 5.984 x 10^7 x 10^5 = 5,984 x 10^12 cm

30 ua = 30 x 1,496 x 10^8 = 44,88 x 10^8 = 4.488 x 10^9 km
= 4.488 x 10^9 x 10^5 = 4.488 x 10^14 cm

9.5 ua = 9.5 x 1,496 x 10^8 = 1.421 2 x 10^8 km
= 1.421 2 x 10^8 x 10^5 = 1.421 2 x 10^13 cm

19.2 ua = 19.2 x 1,496 x 10^8 = 28.723 2 x 10^8 = 2.872 32 x 10^9 km
= 2.872 32 x 10^9 x 10^5 = 2.872 32 x 10^14 cm

0.7 ua = 0.7 x 1,496 x 10^8 = 1.047 2 x 10^8 km
= 1.047 2 x 10^8 x 10^5 = 1.047 2 x 10^13 cm

Voilà j'espère avoir pu t'aider ^^ 

Bonjour


1 ua = 1,50×10^8 km

♤ Sachant que : 1 ua ==> 1,50×10^13 cm on a alors :


1 ua ==> 1,50×10^13 cm
5,2 ua ==> x cm

x = 5,2×1,50×10^13 / 1 = 7,8×10^13 cm



1 ua ==> 1,50×10^13 cm
1,5 ua ==> x cm

x = 1,5×1,50×10^13/1 = 2,25×10^13 cm


1 ua ==> 1,50×10^13 cm
0,4 ua==> x cm

x = 0,4×1,50×10^13/1 = 6×10^12 cm


1 ua ==> 1,50×10^13 cm
30 ua ==> x cm

x = 30×1,50×10^13/1 = 4,5×10^14 cm

1 ua ==> 1,50×10^13 cm
9,5 ua ==> x cm

x = 9,5×1,50×10^13/1 = 1,425×10^14 cm

1 ua ==> 1,50×10^13 cm
19,2 ua ==> x cm

x = 19,2×1,50×10^13/1 = 2,88×10^14 cm


1 ua ==> 1,50×10^13 cm
0,7 ua ==> x cm

x = 0,7×1,50×10^13/1 = 1,05×10^13 cm

Voilà ^^