I believe the answer is C. Positive, since it is a sustainable plan to use a renewable source hope this helps :)
Answer:
2 possible answers. 1. The green box is heavier. or 2nd. The green box has bigger friction than blue box.
Those should be the 2 main explanations. There probably are other options
W=mgh
W=(6)(9.8)(4)
W= 235.2J
Answer:
NASA's Chandra X-ray Observatory and other telescopes such as the Hubble telescope.
Explanation:
Dark matter and normal matter have been wrenched apart by the tremendous collision of two large clusters of galaxies.
The above observations have provided the strongest evidence yet that most of the matter in the universe is dark.
