Types of Molecular Bonds
The measured energy dissociated energy of KCl is 4.43 eV. Use the results of the preceding problem to determine the energy of repulsion of the ions due to the exclusion principle.
Unit Two Notes The human ear is a highly sensitive sound receptor o Pressure fluctuations in the outer ear are transformed into vibrations of small bones (the ossicles) in the middle ear. o The ossicles are ultimately communicated to the cochlea in the inner ear o From there, the vibrations are further transformed by stereocilla (hair cells) into neural impulses distributed by frequency o Humans are capable of detecting pressure variations of less than 1 billionth of an -9 atmosphere (<10 atm) Threshold of hearing o When the pressure is increases from threshold pressure by a factor of about I trillion (10 ), the sound becomes painful to the ear Threshold of pain This huge 10 dynamic range is converted into a logarithmic scale producing a more user-friendly scale. This allows users to clearly visualize huge changes in sound intensity. Anatomy of the Ear o The structures of the outer and middle ear contribute to both the remarkable sensitivity and the wide dynamic range of human hearing o They can be considered to be both a pre-amplifier and a limiter for the human hearing process Outer Ear Gathers and focuses incoming sound on tympanic membrane Amplifies frequencies important to human speech (2 kHz-5 kHz) Convers pressure fluctuations to d