PLS FAST WILL GIVE BRAINLIEST!! Discuss the difference between extensive and intensive properties.

If a || b and e || f, what is the value of y ?

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?

Asubstance that will change shape to fit its container but has a definite volume is in a phase of matter