The water content in soil is defined as the ratio of the mass of water (Mw) to the mass of dry soil (Ms), expressed as a percentage. What is the correct formula? 36. The first reading taken at any ins

Here are the answers to the questions:

Question 35: The water content in soil is defined as the ratio of the mass of water ($M_w$) to the mass of dry soil ($M_s$), expressed as a percentage.

$$w = \frac{M_w}{M_s} \times 100\%$$

The correct option is D.
The final answer is $\boxed{\text{D. } w = \frac{M_w}{M_s} \times 100}$.

Question 36: The first reading taken at any instrument setting in levelling is called a backsight. It is taken on a point of known elevation or a benchmark.
The correct option is B.
The final