A lever is a rigid plank or bar that pivots on a. Question 5 options:

Load

Fulcrum

Effort Force

What is true for a substance that releases energy

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?

How might this scientific phenomena be explained? a paper clip floats on water.