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Beyoncé attended St. Mary's Elementary School in Fredericksburg, Texas, where she enrolled in dance classes. Her singing talent was discovered when dance instructor Darlette Johnson began humming a song and she finished it, able to hit the high-pitched notes. Beyoncé's interest in music and performing continued after winning a school talent show at age seven, singing John Lennon's "Imagine" to beat 15/16-year-olds. In fall of 1990, Beyoncé enrolled in Parker Elementary School, a music magnet school in Houston, where she would perform with the school's choir. She also attended the High School for the Performing and Visual Arts and later Alief Elsik High School. Beyoncé was also a member of the choir at St. John's United Methodist Church as a soloist for two years.

What choir did Beyoncé sing in for two years?
Answer: St. John's United Methodist Church
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Ion gauges are used in ultrahigh vacuum. They come in two types: hot cathode and cold cathode. In the hot cathode version an electrically heated filament produces an electron beam. The electrons travel through the gauge and ionize gas molecules around them. The resulting ions are collected at a negative electrode. The current depends on the number of ions, which depends on the pressure in the gauge. Hot cathode gauges are accurate from 10−3 torr to 10−10 torr. The principle behind cold cathode version is the same, except that electrons are produced in a discharge created by a high voltage electrical discharge. Cold cathode gauges are accurate from 10−2 torr to 10−9 torr. Ionization gauge calibration is very sensitive to construction geometry, chemical composition of gases being measured, corrosion and surface deposits. Their calibration can be invalidated by activation at atmospheric pressure or low vacuum. The composition of gases at high vacuums will usually be unpredictable, so a mass spectrometer must be used in conjunction with the ionization gauge for accurate measurement.

What are the two types of Ion gauges?
Answer: hot cathode and cold cathode.
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Some bar-tailed godwits Limosa lapponica have the longest known non-stop flight of any migrant, flying 11,000 km from Alaska to their New Zealand non-breeding areas. Prior to migration, 55 percent of their bodyweight is stored as fat to fuel this uninterrupted journey.

How far do bar-tailed godwits travel to migrate?
Answer:
11,000 km