Answer:
There's good reason why vitamin D is called “the sunshine vitamin.” When your skin is exposed to sunlight, it makes vitamin D from cholesterol. The sun's ultraviolet B (UVB) rays hit cholesterol in the skin cells, providing the energy for vitamin D synthesis to occur.
Explanation:
Answer: Nuclei combine to form a heavier nucleus, releasing energy.
Explanation: e.g two deuterium nucleus (Hydrogen-2 isotopes) forms an He nucleus and energy is released.
<span> "B. Empty space around the nucleus"
because of this empty space, most radiated particles can pass </span>straight through, while the others get propelled in different directions.
Answer:
skin is the fastest growing organ in human beings.
