The terminal marked negative is the source of electrons that when connected to an external circuit will flow and deliver energy to an external device.
[Answer] hold diverse contents: foods, beverages, oil, chemicals, etc.
It is often used to listen to lung and heart sounds.
[Answer] usually consist of insulated wire wound into a coil.
Typically, a single character is printed on each key press.
[Answer] users can read computer screens and other electronic supports thanks to refreshable [answer] displays.
Today, the simpler alternator dominates large scale power generation, for efficiency, reliability and cost reasons.
The most common shapes are called open-ended spanner and ring spanner.
[Answer] dynamics, like those of aircraft wings, can be modelled by either or both Bernoulli's principle and Newton's third law.
Though the term '[answer]' usually only refers to handguns, other firearms may also have a revolving chamber.
[Answer] are commonly used to fasten pieces of fabric or clothing together.
It rapidly gained wide-scale use as a safer alternative to gun powder and nitroglycerin.
Installed in London in December 1868, it exploded less than a month later, injuring or killing its policeman operator.
It is also a major feature of the fortifications in trench warfare (as a wire obstacle).
In 1876, Scottish emigrant Alexander Graham Bell was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice.
[Answer] came into global use during the 20th century, and developed economies depend on them.
The drink's name refers to two of its original ingredients, which were kola nuts (a source of caffeine) and coca leaves.
[Answer] are used around the world in places where elevators would be impractical.
Whitcomb L. Judson was an American inventor from Chicago who invented and constructed a workable [answer].
LaMarcus Adna Thompson obtained one of the first known patents for a [answer] design in 1885, related to the Switchback Railway that opened a year earlier at Coney Island.
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