at the top most point if Rupert will not fall then normal force at the top point is almost zero for minimum speed
so here we can say

now if





so above will be the minimum speed
According to a source, fringes is the answer. These fringes are what causes dark regions in the double -slit experiment conducted that can be observed in the screen.
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Answer:
mass multiplied by velocity (4 words but uh
Melting, as igneous rock is magma or lava that has cooled and hardened.