Problem: Many ancient civilizations alloyed metals for purely aesthetic purposes. In ancient Egypt and Mycenae, gold was often alloyed with copper to produce red-gold, or iron to produce a bright burgundy-gold. Gold was often found alloyed with silver or other metals to produce various types of colored gold. These metals were also used to strengthen each other, for more practical purposes. Copper was often added to silver to make sterling silver, increasing its strength for use in dishes, silverware, and other practical items. Quite often, precious metals were alloyed with less valuable substances as a means to deceive buyers. Around 250 BC, Archimedes was commissioned by the king to find a way to check the purity of the gold in a crown, leading to the famous bath-house shouting of "Eureka!" upon the discovery of Archimedes' principle.
 Around what time was the Archimedes' principle discovered?
The answer is the following: 250 BC

Problem: Depending on which component of sexual orientation is being assessed and referenced, different conclusions can be drawn about the prevalence rate of homosexuality which has real world consequences. Knowing how much of the population is made up of homosexual individuals influences how this population may be seen or treated by the public and government bodies. For example, if homosexual individuals constitute only 1% of the general population they are politically easier to ignore or than if they are known to be a constituency that surpasses most ethnic and ad minority groups. If the number is relatively minor then it is difficult to argue for community based same sex programs and services, mass media inclusion of gay role models, or Gay/Straight Alliances in schools. For this reason, in the 1970s Bruce Voeller, the chair of the National Gay and Lesbian Task Force perpetuated a common myth that the prevalence of homosexuality is 10% for the whole population by averaging a 13% number for men and a 7% number for women. Voeller generalized this finding and used it as part of the modern gay rights movement to convince politicians and the public that "we [gays and lesbians] are everywhere".
Who was the cahir of the national gay and lesbian task force in the 1970s?
The answer is the following: Bruce Voeller

Problem: In a factor analysis of the latest wave of World Values Survey data, Arno Tausch (Corvinus University of Budapest) found that Protestantism emerges to be very close to combining religion and the traditions of liberalism. The Global Value Development Index, calculated by Tausch, relies on the World Values Survey dimensions such as trust in the state of law, no support for shadow economy, postmaterial activism, support for democracy, a non-acceptance of violence, xenophobia and racism, trust in transnational capital and Universities, confidence in the market economy, supporting gender justice, and engaging in environmental activism, etc.
What university is Arno Tausch from?
The answer is the following: Corvinus University of Budapest

Problem: Prior to the one-drop rule, different states had different laws regarding color. More importantly, social acceptance often played a bigger role in how a person was perceived and how identity was construed than any law. In frontier areas, there were fewer questions about origins. The community looked at how people performed, whether they served in the militia and voted, which were the responsibilities and signs of free citizens. When questions about racial identity arose because of inheritance issues, for instance, litigation outcomes often were based on how people were accepted by neighbors.
What were the hallmarks of free citizens?
The answer is the following:
they served in the militia and voted