Kinetic energy per unit of mass is

Given, 
Therefore,


Now potential energy per unit mass is

Given, 
Therefore,


Thus, total mechanical energy of the river water per unit mass is


OR

Answer:
If i project light rays rhough the glass, then they will refract, or bend.
Explanation:
B sunlight, because the sun has energy and that gives the soil energy and the plant take that energy and is able to grow.
Answer:
4.3 L
Explanation:
Ideal gas law:
PV = nRT
Rearrange:
V / T = nR / P
Since n, R, and P are constant:
V₁ / T₁ = V₂ / T₂
Plug in values and solve:
(3.5 L) / (25 + 273.15 K) = V / (95 + 273.15 K)
V = 4.3 L