1. Play the video for trial 1. Notice the temperature display also says "Timelapse: 15x normal speed". This means the video is sped up so that a 1 minute segment of the video shows something that took 15 minutes in the lab.
Why might it be useful to speed up the video for this experiment?

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.

How does the motion of particles in a gas change as the gas cools

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?