Article: The islands have been shaped by numerous glaciations during the Quaternary Period, the most recent being the Devensian.[citation needed] As this ended, the central Irish Sea was deglaciated and the English Channel flooded, with sea levels rising to current levels some 4,000 to 5,000 years ago, leaving the British Isles in their current form. Whether or not there was a land bridge between Great Britain and Ireland at this time is somewhat disputed, though there was certainly a single ice sheet covering the entire sea.

Question: When did sea levels reach their current highth?
Ans: 4,000 to 5,000 years ago

Article: Giovanni Battista Montini was born in the village of Concesio, in the province of Brescia, Lombardy in 1897. His father Giorgio Montini was a lawyer, journalist, director of the Catholic Action and member of the Italian Parliament. His mother was Giudetta Alghisi, from a family of rural nobility. He had two brothers, Francesco Montini, who became a physician, and Lodovico Montini, who became a lawyer and politician. On 30 September 1897, he was baptized in the name of Giovanni Battista Enrico Antonio Maria Montini. He attended Cesare Arici, a school run by the Jesuits, and in 1916, he received a diploma from Arnaldo da Brescia, a public school in Brescia. His education was often interrupted by bouts of illness.

Question: In what Italian province was Giovanni Battista Montini born?
Ans: Brescia, Lombardy

Article: Blues rock acts that pioneered the sound included Cream, The Jimi Hendrix Experience, and The Jeff Beck Group. Cream, in songs like "I Feel Free" (1966) combined blues rock with pop and psychedelia, particularly in the riffs and guitar solos of Eric Clapton. Jimi Hendrix produced a form of blues-influenced psychedelic rock, which combined elements of jazz, blues and rock and roll. From 1967 Jeff Beck brought lead guitar to new heights of technical virtuosity and moved blues rock in the direction of heavy rock with his band, The Jeff Beck Group. Dave Davies of The Kinks, Keith Richards of The Rolling Stones, Pete Townshend of The Who, Hendrix, Clapton and Beck all pioneered the use of new guitar effects like phasing, feedback and distortion. The Beatles began producing songs in the new hard rock style beginning with the White Album in 1968 and, with the track "Helter Skelter", attempted to create a greater level of noise than the Who. Stephen Thomas Erlewine of AllMusic has described the "proto-metal roar" of "Helter Skelter," while Ian MacDonald argued that "their attempts at emulating the heavy style were without exception embarrassing."

Question: Who played guitar in The Who?
Ans: Pete Townshend

Article: The quality of a vacuum is indicated by the amount of matter remaining in the system, so that a high quality vacuum is one with very little matter left in it. Vacuum is primarily measured by its absolute pressure, but a complete characterization requires further parameters, such as temperature and chemical composition. One of the most important parameters is the mean free path (MFP) of residual gases, which indicates the average distance that molecules will travel between collisions with each other. As the gas density decreases, the MFP increases, and when the MFP is longer than the chamber, pump, spacecraft, or other objects present, the continuum assumptions of fluid mechanics do not apply. This vacuum state is called high vacuum, and the study of fluid flows in this regime is called particle gas dynamics. The MFP of air at atmospheric pressure is very short, 70 nm, but at 100 mPa (~6997100000000000000♠️1103 Torr) the MFP of room temperature air is roughly 100 mm, which is on the order of everyday objects such as vacuum tubes. The Crookes radiometer turns when the MFP is larger than the size of the vanes.

Question: What does the MFP of residual gases show?
Ans:
average distance that molecules will travel between collisions with each other.