Dr. Kuiper is studying the electromagnetic radiation emitted by a star in the Andromeda Galaxy. He has detected three different wavelengths of electromagnetic energy from the star. Which of the following statements describes what Dr. Kuiper should see when he calculates the frequencies of these waves? *

Which statement best explains how world war ii to end the great depression? a. new job opportunities opened as the united states produced more military products. b. the u.s. army provided new jobs that paid better than any other work at the time. c. people had to worry more about war problems than about the economic crisis. d. the war caused people to trust the economy enough to spend more money.

Define production possibility curve

How do direct democracry and representative democary differ