Homework SourseBIO Vibration amplitude in ear The weakest sound a human ear
BIO Vibration amplitude in ear The weakest sound a human ear can possibly hear makes the ear vibrate with the energy of about 10^-19 J. If the spring constant of the ear is 20 N/m, what is the amplitude of vibration of the eardrum? What assumptions did you make? How does this compare to the size of an atom (about 0.5 times 10^-10m)?
Solution
let amplitude of vibration be A
1/2 k A2 = 10 -19
= >1/2 x 20 x A2 =10 -19
=> A = 10-10 mx size of atom
as compared with size of atom the A = 2 x size of atom
