Thirty beats are heard in one minute when two notes are played together. If the higher note has a frequency of 740 Hz, what is the frequency of the lower note

739.5 Hz

Explanation:

Frequency is the the number of wave oscillation that occur in a second. It is measured in Hertz (Hz).

In this question, the frequency of the note is the number of beats that occur in a second. Given that they are Thirty beats are heard in one minute, hence:

Frequency = 30 beat / 1 minute = 30 beats / 60 seconds = 0.5 beat per second = 0.5 Hz

Higher note - lower note = frequency

lower note = higher note - frequency

lower note = 740 Hz - 0.5 Hz

lower note = 739.5 Hz

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles