Along stairway with a metal handrail runs between the houses of amelia and her friend michelle. after getting their parents' permission, the two girls often play near the stairs. one day, michelle stands at the top of the steps and taps the railing with a stone. amelia stands at the bottom of the steps with her right ear pressed against the railing. amelia sees michelle tap the railing, then she hears the sound with the ear that is pressed against the railing. last, amelia hears the sound with her other ear. why did amelia hear the sound with her right ear before her left ear?

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.