Describe the effects on the ecosystem that would occur if the coyote population decreased

What metric units would you use to measure the thickness of a key

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?

What does a numerical subscript following an element in a chemical formula mean?