Sound waves in air are a series of
a. periodic disturbances.
b. periodic condensations and rarefactions.
c. high- and low-pressure regions.
d. all of the above e. none of the above

Asher cycles 12 miles in 16 hours. what is his speed?

What is the temperature in degrees celsius of a substance with a tempature of 49k

When barack obama was running for president, at a campaign stop he tried to bowl, something he isn't very good at. the media loved it because he threw a gutter ball while they were all watching. this is an example of: