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Gilbert cloud chamber, assembled An alternative view of kit contents. The lab contained a cloud chamber allowing the viewer to watch alpha particles traveling at 12,000 miles per second (19,000,000 m/s), a spinthariscope showing the results of radioactive disintegration on a fluorescent screen, and an electroscope measuring the radioactivity of different substances in the set.
Smithsonite is a variably colored trigonal mineral which only rarely is found in well formed crystals. The typical habit is as earthy botryoidal masses. It has a Mohs hardness of 4.5 and a specific gravity of 4.4 to 4.5.
The Misty satellite is believed to have been derived from the KH-11, but modified to make it invisible to radar, and hard to detect visually. The first Misty satellite, USA-53, was released by the Space Shuttle Atlantis on mission STS-36 in 1990.
In recent years, the chemistry set has been re-imagined as a self-study kit, typically offering students better equipment and more explanatory tutorial content. For example, Thames & Kosmos offers a range of CHEM series chemistry sets targeting older children, culminating in the C3000 Kit, which includes a 172-page manual describing 387 ...
The new series, produced by Caragol Wells Productions, showcases the Smithsonian's rarest treasures as Tom Cavanagh meets with the experts behind the Smithsonian and discusses what it takes to preserve these precious artifacts for the generations to come. Stories from the Vaults debuted September 2007 on Smithsonian Networks. The second season ...
The Smithsonian Conservation Biology Institute (SCBI) serves as an umbrella for the Smithsonian's global effort to conserve species and train future generations of conservationists. [28] Ecological processes are highly complex... life and the world are dynamic and ever-changing—it is only with long-term records that many [biological] trends ...
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