A0.5kg bird has a pe of 137.2 j. what height is its perch?

PE = mgh

137.2 = .5*9.8*h

h=137.2/(.5*9.8)

mgh

137.2=.5x10xh

137.2/5=h

~140/5=28metres approx ... tweet tweet

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation:

asthenosphere and convection