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There is one detail wrong in the first post; that is not the lids speed but rather it's minimum speed.
Notice, children, how the common apostrophe from lid's migrated all the way to its.
Isn't nature amazing?
What makes it more amazing is I understood without even noticing the mistake.
Curious, that doesn't seem amazing at all. But to each their own!
Unfortunately they got almost everything else wrong though. Mainly - the cover actually almost certainly just vaporiserd.
That's assuming it crossed the image straight from edge to edge, though.
The cover obtained all of its energy from the blast, it can only go slower than its initial speed unless acted upon by another force.
No no, because they only had one frame of it moving, they can only calculate and upper and lower bound on it's speed. The number given was the lower bound is what theyre saying.