Context and question: 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 103 torr to 1010 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 102 torr to 109 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.
Context and question: International human rights organisations including Human Rights Watch, Amnesty International and the American Association for the Advancement of Science have repeatedly documented and condemned widespread human rights violations in Myanmar. The Freedom in the World 2011 report by Freedom House notes, "The military junta has ... suppressed nearly all basic rights; and committed human rights abuses with impunity." In July 2013, the Assistance Association for Political Prisoners indicated that there were approximately 100 political prisoners being held in Burmese prisons.
In 2011 what did the group Freedom House say concerning the Burma military?
Answer: The military junta has ... suppressed nearly all basic rights; and committed human rights abuses with impunity
Context and question: Isolated remains of Homo erectus in Hathnora in the Narmada Valley in central India indicate that India might have been inhabited since at least the Middle Pleistocene era, somewhere between 500,000 and 200,000 years ago. Tools crafted by proto-humans that have been dated back two million years have been discovered in the northwestern part of the subcontinent. The ancient history of the region includes some of South Asia's oldest settlements and some of its major civilisations. The earliest archaeological site in the subcontinent is the palaeolithic hominid site in the Soan River valley. Soanian sites are found in the Sivalik region across what are now India, Pakistan, and Nepal.
What type of resident lived at the site in Soan River Valley?
Answer:
palaeolithic hominid