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Urutan prefix untuk besaran yaituTera 10^12
Giga 10^9
Mega 106
kilo 10³
hekto 10²
deka 10
...(satuan) meter
desi 10-¹
centi 10-²
mili 10-³
mikro 10^-6
nano 10^-9
piko 10^-12
jadi 7 x 10^-7 cm = 7 x 10^-9 meter = 7 nanometer
a. 7 x 10⁻⁷ cm = 7 x 10⁻⁹ m
= 7 x 10⁻⁹ x 10⁻¹²
= 7 x 10⁻²¹ Tm [Salah]
b. 7 x 10⁻⁹ m
= 7 x 10⁻⁹ x 10⁻²
= 7 x 10⁻¹¹ hm [Salag]
c. 7 x 10⁻⁹ m
= 7 x 10⁻⁹ x 10⁻⁹
= 7 x 10⁻¹⁸ Gm [Salah]
d. 7 x 10⁻⁹ m
= 7 x 10⁻⁹ x 10⁹
= 7 nm [Benar]
Jawaban : D