Answer:
8.18 × 10 ⁻²¹.
Explanation:
The potential energy may be defined as the energy stored in the rest objects. This energy is important for the maintenance of the concentration gradient in the cell.
The change in the potential energy can be calculated as follows:
W = v2-v1 × q.
Here, the charge of the proton is considered because k+ ions has been used.
W= 0 - ( - 70. 5 mV) × 1.602 * 10^-19 C.
W= 8.18 × 10 ⁻²¹J.
Thus, the answer is 8.18 × 10 ⁻²¹.
<u>Answer;</u>
C) organic matter; rocks.
The uppermost horizon, horizon O, in this profile is composed mostly of <u>organic matter</u>, while the lower horizon, horizon C, is composed mostly of <u>rocks.</u>
<u>Explanation;</u>
-Soil contains the following major horizons, that is A B and C. Some soils may have horizon O, which may be thin or thick or even lack in some soils. This O horizon is found at the surface of many soils and normally contains organic materials at various decomposition stages. these are materials such as plants, leaves and bugs.
-C horizon is the layer that is below the B horizon. It contains larger weathered fragments or broken up-bedrock.
- Parent material. Few soils weather directly from the underlying rocks. ...
- Climate. Soils vary, depending on the climate. ...
- Topography. Slope and aspect affect the moisture and temperature of soil. ...
- Biological factors. Plants, animals, micro-organisms, and humans affect soil formation.
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