—– was elected U.S. President in 1972. (Full name.)

The first African American man to run for U.S. President was 

According to your text, two reasons for migration into the United States by the 1990s included

A sonar signal is sent from an oceangoing ship, and the signal returns from the bottom 1.75 s later. How deep is the oceanbeneath the ship if the speed of sound in seawater is 1,530 m/s?

The restoring force of a spring is proportional to the displacement of the object at the end.

Sound travels faster through cold, denser air than through warm, less dense air. 

The amplitude of a wave is the distance from the crest to the equilibrium position

The unit of electric potential difference between two points is 

The unit of electric charge is called a(an) 

Match the process or error pattern with the category. (There is only one match for each answer choice.)