I know that protons and neutrons are located at the center of an atom, so the correct answer is D
Answer:
unmmmmmmmm I think the answerA
Answer: Single replacement
Explanation: A P E X
Answer:
time machine popularized the concept of time travel by mechanical means. Yes a long time ago, mahal
Answer:

Explanation:
The maximum speed of the block occurs when spring has no deformation, that is, there is no elastic potential energy, which can be remarked from appropriate application of the Principle of Energy Conservation:


