Acoustical ceilings, musical instruments, and spectroscopes are examples of technology that takes advantage of sound waves that change speeds and make different sounds because .

with the invention of the automobile, the woman of the house could drive to the store and get groceries. women were also free to socialize more. during world war ii women were allowed to work in factories to the war effort and could drive to work or ride mass transit buses to their jobs.

answera compound;