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Prince Rupert's drops have remained a scientific curiosity for nearly 400 years due to two unusual mechanical properties: [4] when the tail is snipped, the drop disintegrates explosively into powder, whereas the bulbous head can withstand compressive forces of up to 664,300 newtons (67,740 kg f).
The value of brisance depends on the application. At one extreme, if an explosive is to be used for propulsion, e.g. by driving a piston or a bullet, brisance is likely to be undesirable, because the objective will be to move the load, not to shatter it or the engine or
For example, the U.S. National Institute of Justice standard 0104.04 for bullet-resistant vests specifies that a Type II vest must not deform clay representing the wearer's body when hit by an 8.0 g (124 gr) 9 mm caliber round nosed full-metal jacket bullet travelling at up to 358 m/s (1175 ft/s); but a Type IIIA vest is needed for protection ...
A 4-year-old accidentally knocked over and shattered a 3,500-year-old Bronze Age jar during a visit to the Hecht Museum at the University of Haifa in Israel on Friday.. The museum said the ...
Frangible bullets may be lighter or longer than conventional bullets of the same calibre. The jacketed frangible bullet in the centre is longer than the outer soft-point bullets with traditional lead cores. Each of the three .30 calibre (7.62 mm) bullets weighs 150 grains (9.7 g) but the lower density frangible core requires greater volume.
Bulletproof glass of a jeweler's window after a burglary attempt. The Mona Lisa behind bulletproof glass at the Louvre Museum. Bulletproof glass, ballistic glass, transparent armor, or bullet-resistant glass is a strong and optically transparent material that is particularly resistant to penetration by projectiles, although, like any other material, it is not completely impenetrable.
Stand on the sidewalk outside the hospital and look south on a clear day and you can see the pale marble and granite of City Hall, about 4 miles away, near Philly’s pelvis. You can go to Temple for high-end elective surgery, like getting a knee replacement or a heart transplant, same as at any other major teaching hospital in the country.
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