Coins were developed as a medium of exchange because other items like cows, grain, and land were more difficult to move from place to place.
a. true
b. false

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?

What word chemical equation describes cavendish’s experiment with zinc?