Niagara Falls is 90 decibels and a normal conversation is 60 decibels. This means that A) the intensity of sound from Niagara Falls is 1.5 times greater than from a normal conversation. B) the...

Niagara Falls is 90 decibels and a normal conversation is 60 decibels. This means that A) the intensity of sound from Niagara Falls is 1.5 times greater than from a normal conversation. B) the intensity of sound from Niagara Falls is times greater than from a normal conversation. C) the intensity of sound from Niagara Falls is 1,000 times greater than from a normal conversation. D) the intensity of sound from Niagara Falls is 30 times greater than from a normal conversation. Question 2 Consider the following two situations: You are stationary and a siren moves towards you at speed v = 10 m/s. A siren is stationary and you move towards it at speed v = 10 m/s. According to the Doppler effect, A) the frequencies will decrease by the same amount in cases 1 and 2. B) you will hear the same frequencies in cases 1 and 2. C) you will hear different frequencies in cases 1 and 2. D) the frequencies will increase by the same amount in cases 1 and 2.