Most likely B. Will erode, if not it will grow weeds
Answer:
The inventor of the electric cell was:
Alessandro Volta (in other words, Volta)
Explanation:
Hydroelectric power. That's just the term for electricity gained by using water, think of a water mill.
Answer:
Using g = 9.8: 1.02 kg, Using g = 10: 1 kg
Explanation:
E = mgh
20 = m(9.8)(3 - 1)
20 = 9.8m(2)
20 = 19.6m
m = 1.02 kg
I'm now assuming you may be using a g constant of 10, thus the close integer result, in which case the mass would be exactly 1 kilogram.
Stop and look to see if anything is coming
