Answer:
Humus, which ranges in colour from brown to black, consists of about 60 percent carbon, 6 percent nitrogen, and smaller amounts of phosphorus and sulfur. As humus decomposes, its components are changed into forms usable by plants.
samira-
Electricity can't be generated at night because the power is reduced when the clouds cover. The solar panel is maximized when the panel is facing directly at the sun. Hope this helps.
The acceleration is equal to force divided by mass which would be 100 / 50 which is 2 m/s2
