Read e-book online Matter (DK Eyewitness Books) PDF

By Chris Cooper

ISBN-10: 0789455803

ISBN-13: 9780789455802

ISBN-10: 0789461730

ISBN-13: 9780789461735

Discover the discoveries, instruments and strategies that experience stored human lives and better human overall healthiness through the a while. here's a impressive, thought-provoking, and hugely informative consultant to the interesting tale of drugs. fantastic colour pictures of clinical tools and experiments, plus glossy inner imaging, provide a distinct "eyewitness" view of the fantastic discoveries that experience reworked our realizing of scientific technological know-how. See a collection of fake tooth from historic Rome, how amputations have been performed earlier than anesthetics, what the 1st microscopes gave the look of, what a crash cart is used for, and the way the periwinkle is utilized in the remedy of leukemia. find out how Charles II of britain tried to medication greater than 92,000 humans of scrofula, how drugs have been made within the nineteenth century, how using antiseptics turned frequent, and what occurs in the course of microsurgery. notice how unsuccessful physicians in old Egypt had their fingers bring to a halt, how black ants have been as soon as used rather than stitches to seal wounds, and why the paintings. and masses, even more!

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Extra info for Matter (DK Eyewitness Books)

Sample text

The tube later became known as the Crookes tube. Paper scale for measuring deflection of electron beam experiments by English physicist J. J. Thomson (1856-1940) in 1897. He discovered particles that were smaller than atoms in cathode rays. These rays were seen passing between high voltage terminals in a glass tube filled with low pressure gas. The particles, called corpuscles by Thomson and later known as electrons, had a negative electric charge and were about 2,000 times lighter than a hydrogen atom.

ABSORBING EXPERIMENT This 19th-century spectroscopic experiment shows light from a gas flame passing through a liquid containing dissolved materials. The spectrum that is produced reveals the identity of the dissolved materials in the liquid. 56 Building nuclei by fusion HARNESSING FUSION At temperatures of millions of degrees, electrons are completely stripped from atoms. Light nuclei such as hydrogen can collide, despite the mutual repulsion of their positive electric charges. The fusion of hydrogen nuclei to form helium nuclei powers the sun, a hydrogen bomb, and the prospective Deuterium fusion reactors nucleus of the future.

Inside the Torus temperatures can reach as high as 550 million° F (about 300 million° C). 57 3 KEEPING THE HEAT IN The helium-5 nucleus sheds a neutron, and gives out radiation. A stable helium-4 nucleus remains. The energy of the neutron and the radiation is absorbed by plasma, or by surrounding matter, and is turned into heat. The plasma must not be cooled by contact with other matter, and is confined within magnetic fields. To work efficiently, this confinement must be sustained long enough for the reaction to give out more energy than has to be put in.

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Matter (DK Eyewitness Books) by Chris Cooper

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