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How does this fossil differ from fossils that have preserved remains?

Which feature does this fossil have that preserved remains do not have?

It has carbon residue left by a decaying organism.

It was formed by tree sap that turned into amber.

It was preserved in frozen soil called permafrost.

It includes the preserved soft tissue of an organism.

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Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?

If you held a stone over the mouth of a well and then let it go , what would happen to the stone? explain your answer.