Answer:
hums? or is this asking if these are an infrasound than no
Explanation:
because the sound has to extend below the range of human hearing (from 20 Hz down to 0.001 Hz)
Answer: Yes kinda but on the other hand no because Which sentence could be added after sentence 4 to support the first paragraph?
Explanation: Furthermore, riding a bicycle is a great way to exercise and to breathe fresh air. The traffic in neighborhoods near schools would also be considerably lighter.
A car that is running while sitting in line gives off just as much pollution as a moving car. The school district would save a great amount of money if fewer buses were needed.