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Wind instruments became more refined in the Classical era. While double reeded instruments like the oboe and bassoon became somewhat standardized in the Baroque, the clarinet family of single reeds was not widely used until Mozart expanded its role in orchestral, chamber, and concerto settings.
What type of instrument was somewhat standardized int eh Baroque era?
A: double reeded

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Many of the limitations of the classic commutator DC motor are due to the need for brushes to press against the commutator. This creates friction. Sparks are created by the brushes making and breaking circuits through the rotor coils as the brushes cross the insulating gaps between commutator sections. Depending on the commutator design, this may include the brushes shorting together adjacent sections – and hence coil ends – momentarily while crossing the gaps. Furthermore, the inductance of the rotor coils causes the voltage across each to rise when its circuit is opened, increasing the sparking of the brushes. This sparking limits the maximum speed of the machine, as too-rapid sparking will overheat, erode, or even melt the commutator. The current density per unit area of the brushes, in combination with their resistivity, limits the output of the motor. The making and breaking of electric contact also generates electrical noise; sparking generates RFI. Brushes eventually wear out and require replacement, and the commutator itself is subject to wear and maintenance (on larger motors) or replacement (on small motors). The commutator assembly on a large motor is a costly element, requiring precision assembly of many parts. On small motors, the commutator is usually permanently integrated into the rotor, so replacing it usually requires replacing the whole rotor.
 What is not created by contact between parts of the motor?
A: unanswerable

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His first professional TV job came when he was hired to direct one of the segments for the 1969 pilot episode of Night Gallery. The segment, "Eyes," starred Joan Crawford; she and Spielberg were reportedly close friends until her death. The episode is unusual in his body of work, in that the camerawork is more highly stylized than his later, more "mature" films. After this, and an episode of Marcus Welby, M.D., Spielberg got his first feature-length assignment: an episode of The Name of the Game called "L.A. 2017". This futuristic science fiction episode impressed Universal Studios and they signed him to a short contract. He did another segment on Night Gallery and did some work for shows such as Owen Marshall: Counselor at Law and The Psychiatrist, before landing the first series episode of Columbo (previous episodes were actually TV films).
What was Steven Spielberg's first feature-length assignment?
A: an episode of The Name of the Game called "L.A. 2017".

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The discovery of infrared radiation is ascribed to William Herschel, the astronomer, in the early 19th century. Herschel published his results in 1800 before the Royal Society of London. Herschel used a prism to refract light from the sun and detected the infrared, beyond the red part of the spectrum, through an increase in the temperature recorded on a thermometer. He was surprised at the result and called them "Calorific Rays". The term 'Infrared' did not appear until late in the 19th century.
Who discovered infrared radiation?
A:
William Herschel