Aloud factory machine produces sound having a displacement amplitude in air of 1.00 μm, but the frequency of this sound can be adjusted. in order to prevent ear damage to the workers, the maximum pressure amplitude of the sound waves is limited to 10.0 pa. under the conditions of this factory, the bulk modulus of air is 1.31×105 pa. the speed of sound in air is 344 m/s. what is the highest-frequency sound to which this machine can be adjusted without exceeding the prescribed limit?

Two horses begin at rest. after a few seconds, horse a is traveling with a velocity of 10 m/s west, while horse b is traveling with a velocity of 13 m/s west. which horse had a greater acceleration? a. horse a because its change in velocity was greater than horse b's in the same time. b. horse b because its change in velocity was greater than horse a's in the same time. c. horse b because its change in velocity was the same as horse a's, but it took less time. d. both horses had the same acceleration.