hard X ray

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Aspirin pills.

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Berries and leaves of the bittersweet nightshade (Solanum dulcamara) plant. Poisonous plant

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Drinking water is poured into a glass.

Water Fluoridation: Just the Facts

Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

7 Deadliest Weapons in History

US Marines firing at Fallujah, Iraq, during the Second Battle of Fallujah in November 2004. Operation Iraqi Freedom, Iraq War.

Timeline of the 2000s

Ethel Rosenberg arrested in August 1950. Photograph dated Aug. 8, 1950. American civilians executed for espionage. Spies, communists, Julius Rosenberg

Spies Like Us: 10 Famous Names in the Espionage Game

hard X ray

physics

Learn about this topic in these articles:

wavelength

In spectroscopy: Synchrotron sources
…and 200 angstroms), or the hard (high-energy) X-ray portion (1–20 angstroms) of the electromagnetic spectrum.
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