What relationship did Henrietta Swan Leavitt Discover about Cepheid variable stars that made them useful as standard candles for measuring distances? Leavitt showed that her variable stars, called Cepheids, could tell astronomers their true luminosity over the course of their cycle, no matter how bright they appeared from Earth. So, if a distant galaxy contains […]
Why did Philip II have an advantage over Greek city-states?
Why did Philip II have an advantage over Greek city-states? Why did Philip II have an advantage over the Greek city-states? He unified the Greek city-states. He conquered the Persian Empire. He destroyed Macedonia’s military. How was Philip able to conquer most of Greece? How was Philip II able to conquer Greece? He organized his […]
Who established psychology as an independent discipline?
Who established psychology as an independent discipline? Wilhelm Wundt Which of the following individuals is responsible for establishing psychology as an independent discipline with its own subject matter? What roles did Wundt and James play in establishing psychology? However, both Wundt and James helped create psychology as a distinct scientific discipline. Wundt was a structuralist, […]
Is marginal utility the same as marginal benefit?
Is marginal utility the same as marginal benefit? Marginal utility describes the benefit that one economic actor receives from consuming one additional unit of a good, while marginal benefit describes (in dollars) what the consumer is willing to pay to acquire one more unit of the good. What is marginal cost and marginal benefit? A […]
How did improved irrigation practices help farmers?
How did improved irrigation practices help farmers? In areas that have irregular precipitation, irrigation improves crop growth and quality. By allowing farmers to grow crops on a consistent schedule, irrigation also creates more reliable food supplies. Ancient civilizations in many parts of the world practiced irrigation. Did ancient Japan have irrigation systems? The basic features […]
What is subsistence farming in Africa?
What is subsistence farming in Africa? Roughly 65 percent of Africa’s population relies on subsistence farming. Subsistence farming, or smallholder agriculture, is when one family grows only enough to feed themselves. Without much left for trade, the surplus is usually stored to last the family until the following harvest. What are examples of subsistence farming? […]
What is The Marriage Go Round who developed this concept?
What is The Marriage Go Round who developed this concept? Andrew J. Cherlin’s Which of the following characterized the preindustrial family group of answer choices? Which of the following characterized the preindustrial family? Husbands and wives were partners in both homemaking and economic labor. Marriages that cross racial and ethnic lines have become more common […]
Which of the best describes the official status of African Americans in the United States during World War 1?
Which of the best describes the official status of African Americans in the United States during World War 1? African Americans were considered second class citizens. What caused Africa American demographic patterns in the US to shift during ww1? What caused African-American demographic patterns in the US to shift during World War 1? More job […]
What are the Southern colonies names?
What are the Southern colonies names? The Southern colonies included Maryland, Virginia, North and South Carolina, and Georgia. When were the Southern colonies founded? Southern Colonies Southern Colonies Chart Date Name of Colony or Settlement Region 1607 Virginia Colony Southern 1633 Maryland Colony Southern 1653 North Carolina Colony Southern What did the southern colonies focus […]
Why are all resources scarce?
Why are all resources scarce? Even free natural resources can become scarce if costs arise in obtaining or consuming them, or if consumer demand for previously unwanted resources increases due to changing preferences or newly discovered uses. What do economists mean by scarcity? What do economists mean by scarcity? Economists mean that unlimited wants exceed […]