Article: Thermal conductivity gauges rely on the fact that the ability of a gas to conduct heat decreases with pressure. In this type of gauge, a wire filament is heated by running current through it. A thermocouple or Resistance Temperature Detector (RTD) can then be used to measure the temperature of the filament. This temperature is dependent on the rate at which the filament loses heat to the surrounding gas, and therefore on the thermal conductivity. A common variant is the Pirani gauge which uses a single platinum filament as both the heated element and RTD. These gauges are accurate from 10 torr to 10−3 torr, but they are sensitive to the chemical composition of the gases being measured.

Question: A Pirani gauge is accurate within what ranges?
Ans: 10 torr to 10−3 torr


Article: Glass has the ability to refract, reflect, and transmit light following geometrical optics, without scattering it. It is used in the manufacture of lenses and windows. Common glass has a refraction index around 1.5. This may be modified by adding low-density materials such as boron, which lowers the index of refraction (see crown glass), or increased (to as much as 1.8) with high-density materials such as (classically) lead oxide (see flint glass and lead glass), or in modern uses, less toxic oxides of zirconium, titanium, or barium. These high-index glasses (inaccurately known as "crystal" when used in glass vessels) cause more chromatic dispersion of light, and are prized for their diamond-like optical properties.

Question: Why are high-index glasses valued?
Ans: for their diamond-like optical properties


Article: In 1610, all but three of the survivors of the Sea Venture sailed on to Jamestown. Among them was John Rolfe, whose wife and child died and were buried in Bermuda. Later in Jamestown he married Pocahontas, a daughter of the powerful Powhatan, leader of a large confederation of about 30 Algonquian-speaking tribes in coastal Virginia. In 1612, the English began intentional settlement of Bermuda with the arrival of the ship Plough. St. George's was settled that year and designated as Bermuda's first capital. It is the oldest continually inhabited English town in the New World.

Question: Who was one of the original survivor's to sail on to Jamestown.
Ans: John Rolfe


Article: In 2013 tourism within the state from local citizens accounted for 39.9% of tourists, the second highest originating location for tourists to Tennessee is the state of Georgia, accounting for 8.4% of tourists.:17 Forty-four percent of stays in the state were "day trips", 25% stayed one night, 15% stayed two nights, and 11% stayed 4 or more nights. The average stay was 2.16 nights, compared to 2.03 nights for the US as a whole.:40 The average person spent $118 per day: 29% on transportation, 24% on food, 17% on accommodation, and 28% on shopping and entertainment.:44

Question: Which other state sent Tennessee the most tourists in 2013?
Ans:
Georgia