Give three reason for lose of energy from one trophic level to another in food chain?

How are calculation for velocity and speed different

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

Most short-period comets do not have randomly oriented orbits because