Question
G1 and G7 are common form factors for these objects. For 10 points each:
[10h] Name these objects, which are often described by their sectional density. The pressure generated by these objects is often measured in copper units of pressure.
ANSWER: bullets [or rounds; or ammunition; or ammo; or cartridges; prompt on guns or firearms or weapons; prompt on but DO NOT OTHERWISE REVEAL projectiles]
[10e] Bullets are prototypical examples of these objects, whose motion is studied in external ballistics. The trajectory of these objects is influenced by gravity and air resistance.
ANSWER: projectiles [accept projectile motion]
[10m] The chamber pressure created by a bullet can is indirectly measured with a device that measures this quantity consisting of thin parallel zig-zags of metal foil on an insulating film. A factor named for this quantity relates it to the change in electrical resistance due to deformation, as measured by a Wheatstone bridge.
ANSWER: strain [accept strain gauges; prompt on epsilon]
<Chen, Physics>
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