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: With roots dating back to 1909 in the university's School of Social Economy, the George Warren Brown School of Social Work (commonly called the Brown School or Brown) was founded in 1925. Brown's academic degree offerings include a Master of Social Work (MSW), a Master of Public Health (MPH), a PhD in Social Work, and a PhD in Public Health Sciences. It is currently ranked first among Master of Social Work programs in the United States. The school was endowed by Bettie Bofinger Brown and named for her husband, George Warren Brown, a St. Louis philanthropist and co-founder of the Brown Shoe Company. The school was the first in the country to have a building for the purpose of social work education, and it is also a founding member of the Association of Schools and Programs of Public Health. The school is housed within Brown and Goldfarb Halls, but a third building expansion is currently in progress and slated to be completed in summer 2015. The new building, adjacent to Brown and Goldfarb Halls, targets LEED Gold certification and will add approximately 105,000 square feet, more than doubling the school's teaching, research, and program space.
What degree programs are offered by the George Warren Brown School of Social Work?
The answer is the following: Master of Social Work (MSW), a Master of Public Health (MPH), a PhD in Social Work, and a PhD in Public Health Sciences

Problem: Maternal factors also play a role in the body's immune response. At birth, most of the immunoglobulin present is maternal IgG. Because IgM, IgD, IgE and IgA don't cross the placenta, they are almost undetectable at birth. Some IgA is provided by breast milk. These passively-acquired antibodies can protect the newborn for up to 18 months, but their response is usually short-lived and of low affinity. These antibodies can also produce a negative response. If a child is exposed to the antibody for a particular antigen before being exposed to the antigen itself then the child will produce a dampened response. Passively acquired maternal antibodies can suppress the antibody response to active immunization. Similarly the response of T-cells to vaccination differs in children compared to adults, and vaccines that induce Th1 responses in adults do not readily elicit these same responses in neonates. Between six to nine months after birth, a child's immune system begins to respond more strongly to glycoproteins, but there is usually no marked improvement in their response to polysaccharides until they are at least one year old. This can be the reason for distinct time frames found in vaccination schedules.
Newborns can acquire antibodies from the mother through what means?
The answer is the following: breast milk

Problem: During John's early years, Henry attempted to resolve the question of his succession. Henry the Young King had been crowned King of England in 1170, but was not given any formal powers by his father; he was also promised Normandy and Anjou as part of his future inheritance. Richard was to be appointed the Count of Poitou with control of Aquitaine, whilst Geoffrey was to become the Duke of Brittany. At this time it seemed unlikely that John would ever inherit substantial lands, and he was jokingly nicknamed "Lackland" by his father.
When was Henry crowned King of England?
The answer is the following:
1170