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Hybrid armor is layered with hard shell outer materials. European standard EN-1621 is used to rate the effectiveness of armor. In this standard, a 5 kg flat impactor impacts the armor at a speed of 4.47 m/s (energy 5x4,47x4,47/2=50 J "Joules"). 50 J of energy is roughly equivalent to dropping a 1 kg mass from a height of 5m (E=mGH).
The outermost layer of a space suit, the Thermal Micrometeoroid Garment, provides thermal insulation, protection from micrometeoroids, and shielding from harmful solar radiation. There are four main conceptual approaches to suit design: NASA's experimental AX-5 hard-shell space suit (1988)
Trophy's radar and covered projectile launcher. Merkava Mk 4m equipped with Trophy APS technology during Operation Protective Edge.. Trophy (Israel Defense Forces designation מעיל רוח, 'Windbreaker') is a protection system for military armored vehicles.
In this case, boring sponges attacked this hard clam shell after the death of the clam, producing the trace fossil Entobia. Exoskeletons, as hard parts of organisms, are greatly useful in assisting the preservation of organisms, whose soft parts usually rot before they can be fossilized. Mineralized exoskeletons can be preserved as shell fragments.
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A waterproof, breathable (hard shell) jacket. The outermost clothes are called the shell layer, but only if they block wind or water or have good mechanical strength. Both "soft" and "hard" shell jackets and layers exist. Hard shells are commonly woven fabrics and do not rip. Soft shells may rip more easily.
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