C ,The amount of water released through the dam and the dam's height account for the potential energy.
<u>Explanation:</u>
Hoover dam in Nevada generate the electricity by the hydroelectric power . it is the form of energy. Its provides 96% of the renewable energy in the united states : it power comes from the water. When the water is falling on the turbine it experience the force of gravity.
It is used to turn turbine and generators that produce electricity; to generate electricity the water is in motion, it experiences the potential energy. When the blades turns it experiences the mechanical energy then into form to electrical energy. The potential energy is depends on the two factors that is mass of the dam and the height of the dam.
Answer:b)lubricating surfaces
Explanation:took it on edge hope this helped
Answer:
1. Green beetles and red beetles exist in the environment.
2. Birds that eat the beetles move into the environment.
3. Red beetles are eaten by birds, but green beetles aren’t eaten.
4. Green beetles pass on their color trait to future offspring.
5. The entire population of beetles eventually becomes green in color.
Explanation:
According to the theory of natural selection, only those species survives which fits closely with their environment. According to the conditions given, there are two genetic variations of the same species based on the color, i.e. green and red. Initially, both red and green are living together in a grassland (green in color). Then, birds enter the same environment because they have food there (beetles). Now, green beetles will take a competitive advantage because of the color and avoid getting eaten by the birds. However, red beetles would be prominent and eaten fast. The green beetles will pass on their genetic variation causing the color to be green in their future offspring and a time will come when there will be on green beetles in the area.
Answer:
b. cell x because it has chloroplast.
It must go through the plasma membrane
