QUESTION 1
Change the following measurement into SN.
0.0020140 mega $L$
$2.01 \times 10^{-3} \mathrm{ML}$
$2.0140 \times 10^{3} \mathrm{ML}$
$2.0140 \times 10^{-3} \mathrm{ML}$
$2.014 \times 10^{-3} \mathrm{ML}$

Step 1 ：The question is asking to convert the given measurement into scientific notation (SN). The given measurement is 0.0020140 mega liters (ML).

Step 2 ：In scientific notation, a number is represented as a number between 1 and 10 multiplied by a power of 10.

Step 3 ：The given number is less than 1, so the exponent of 10 in the scientific notation will be negative.

Step 4 ：To convert the given number into scientific notation, we need to move the decimal point to the right until we get a number between 1 and 10. The number of places we move the decimal point will be the absolute value of the exponent of 10 in the scientific notation.

Step 5 ：Final Answer: The given measurement in scientific notation is \(\boxed{2.01 \times 10^{-3} \, \mathrm{ML}}\).