Answer:
By conservation of energy, it can climb up to a height equal to that it went down before. However, due to the friction in the machines, the total mechanical energy of the roller coaster will decrease. As a result, the first "hill" of many roller coasters are the highest, but the followings will have decreasing heights.
Explanation:
No they do not they just need to be in each other's magnetic field
Answer:
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Answer:
can you post the full question plz
Explanation:
