Question

20/500 dyne =.............newton

Answer 1

1 dyne = 100 newton
20/500 dyne = 4 newton.

Answer 2

1 N = 10^5 dyne
20/500 dyne = 20/500/10^5
------------------ = 1/2500000 atau 0,0000004 N

kenapa 1 N = 10^5 dyne?
1 N = 1 kg.m/s^2 sedangkan 1 dyne = 1 g.cm/s^2
jadi
1 kg.m/s^2 = 10^3 g. 10^2 m/ 10^1 s
--------------- = 10^5 g.cm/s^2