Probably so, at least when the animals were young.
No
a few are t rex,microraptor,velociraptor,troodon,caudipteryx, and archaeopteryx
Yes, if mosquitos that are preserved in amber that sucked the blood of a T-Rex could be harvested, the DNA sequence of the T-Rex could be extracted and replicated, and, combined with that of common frogs, could be used to clone a T-Rex. Source: Jurassic Park
As fast as T-Rex could run.
Uh maybe around like 20 Raptors could kill a t-rex
No
Yes, evidence suggests that some species of theropod dinosaurs, including certain relatives of Tyrannosaurus rex, likely had feathers or feather-like structures. Fossil discoveries, particularly in closely related species, indicate that feathers may have played roles in insulation, display, or other functions. However, it's unclear whether T. rex itself had feathers as adults, as some studies suggest it might have had scales instead. Overall, the presence of feathers in the lineage leading to T. rex remains an area of active research.
When T-Rex lived there were no cows, so the answer is none.
yes
Depends on how fat it was... Glad I could help!
Conservatively, 430lbs
Probably.