Answer:
D. Friction and air resistance created heat on his trip up the hill.
Explanation:
Energy transformation from one form to another is not 100% efficient. This is the postulate of the first law of thermodynamics.
Most of the energy transformation is not purely 100%.
When energy is transformed, some are usually wasted.
- In this case, in moving from bottom up, Superman produced some heat and encountered air resistance.
- To reach the top, he must have overcome the resistance and produce enough heat to power him through.
- This reduces the amount of potential energy that should have been the same as the kinetic energy down below.
Learning evolution huh? Good question there. Natural selection alters the gene frequency in a gene pool, changing the population.
Natural selection tends to promote adaptation by maintaining favorable adaptations in a constant environment (stabilizing selection) or improving adaptation in a direction appropriate to environmental changes (directional selection).
Source(s):
How evolution works
https://m.youtube.com/watch?v=hOfRN0KihOU
Yahoo natural selection question
The answer to this question is Gravity
The answer is C. relative dating I think
