Q. $1$ unified atomic mass unit $(1 u)$ is equal to

2229 222 Physical World, Units and Measurements Report Error

A

$1.66 \times 1 0^{- 25} k g$

11%

B

$1.66 \times 1 0^{- 27} k g$

47%

C

$1.66 \times 1 0^{- 29} k g$

21%

D

$1.66 \times 1 0^{- 31} k g$

21%

Solution:

$1 u = 1.66 \times 1 0^{- 27} k g$