How fast would you be falling in miles per hour after you fell 5, feet if there were no air resistance? An interesting question for a mathematician, which we here at the Free Fall Research Page do not claim to be, but we'll take a shot at it. We used this Physics Class Room page as a reference. You may find it helpful.
Lenz' Law copper tube thickness question
Lenz' Law copper tube thickness question | Physics Forums
For as they have been successful in inducing belief, so they have been effective in quenching and stopping inquiry; and have done more harm by spoiling and putting an end to other men's efforts than good by their own. Those on the other hand who have taken a contrary course, and asserted that absolutely nothing can be known — whether it were from hatred of the ancient sophists, or from uncertainty and fluctuation of mind, or even from a kind of fullness of learning, that they fell upon this opinion — have certainly advanced reasons for it that are not to be despised; but yet they have neither started from true principles nor rested in the just conclusion, zeal and affectation having carried them much too far. The more ancient of the Greeks whose writings are lost took up with better judgment a position between these two extremes — between the presumption of pronouncing on everything, and the despair of comprehending anything; and though frequently and bitterly complaining of the difficulty of inquiry and the obscurity of things, and like impatient horses champing at the bit, they did not the less follow up their object and engage with nature, thinking it seems that this very question — viz. And yet they too, trusting entirely to the force of their understanding, applied no rule, but made everything turn upon hard thinking and perpetual working and exercise of the mind. Now my method, though hard to practice, is easy to explain; and it is this. I propose to establish progressive stages of certainty.
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I run a 22 recoil spring in it even with my hottest loads and after some 9,rds, it shows no signs of any wear. The load is at the bottom of the 'full power' level and not considered a hot load out of a 6" barrel for this round as many handloaders and hunters have tried their , , , and even grn 45 Super hunting loads at and above this velocity. Why do they push the 45 Super that hard?
History[ edit ] Early modern era[ edit ] In , Francesco Maria della Rovere commissioned Filippo Negroli to create a bulletproof vest. Similarly, in Sir Henry Lee expected his Greenwich armor to be "pistol proof". Its actual effectiveness was controversial at the time. During the English Civil War Oliver Cromwell 's Ironside cavalry were equipped with Capeline helmets and musket-proof cuirasses which consisted of two layers of armor plate in later studies involving X-ray a third layer was discovered which was placed in between the outer and inner layer.