MCQ
If $1$ nanometer is equal to $\frac{1}{1000000000}\text{m}$ Write $23$ nanometer in meter and in standard form:
- ✓$2.3 \times 10^{-8}m$
- B$2.3 \times 10^{-9}m$
- C$2.3 \times 10^{-10}m$
- D$\frac{23}{1000000000}\text{m}$
✓
Answer
Correct option: A.
$2.3 \times 10^{-8}m$
A. $2.3 \times 10^{-8}m$
Solution:
$1\text{nm}=\frac{1}{1000000000}\text{m}=1\times10^{-9}$
Multiplying $23$ to both side,
$23nm = 23 \times 1 \times 10^{-9}$
$= 23 \times 10^{-9}m$
$= 23 \times 10 \times 10^{-9}$
$=2.3 \times 10^{-8}m$
Solution:
$1\text{nm}=\frac{1}{1000000000}\text{m}=1\times10^{-9}$
Multiplying $23$ to both side,
$23nm = 23 \times 1 \times 10^{-9}$
$= 23 \times 10^{-9}m$
$= 23 \times 10 \times 10^{-9}$
$=2.3 \times 10^{-8}m$
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