When a plastic rod is rubbed with wool, the wool becomes positively charged because * electrons are transferred from the wool to the rod
protons are transferred from the wool to the rod
electrons are transferred from the rod to the wool
protons are transferred from the rod to the wool

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?