Réponse :
Explications :
10⁻³¹ . 10⁸ / 10⁻⁹ = 10⁻²³ / 10⁻¹⁹ = 10 ⁻²³⁺¹⁹ = 10⁻⁴
10⁻¹¹ . 10⁻²⁵ . 10⁻³⁴ / ( 10⁻⁴)³ = 10⁻⁷⁰ / 10⁻¹² = 10⁻⁷⁰ . 10¹² = 10⁻⁵⁸
1/ a/ 300 000km.s⁻¹ = 3.10⁵ km.s⁻¹
b/ 0.040 MHz = 4.10⁻² MHz = 4.10⁻² . 10⁶ = 4.10⁴ Hz
c/ C = 68 nf = 68.10⁻⁹ f = 6,8 . 10⁻⁸ f
Centaine de milliers
Méga million
nano milliardième
a/ Age de la Terre : 4,5 .10⁹ a
b/ 5 mW = 0,005 W = 5.10⁻³ W
c/ 44,1 . 10³ Hz = 44,1 KHz = 4,41.10⁻¹ KHz
