Engineering, 25.11.2019 20:31, nkazmirski3229
In 1945, the united states tested the world’s first atomic bomb in what was called the trinity test. following the test, images were published showing the evolution of the blast. a few years later, a british scientist, by the name of g. i. taylor, used dimensional analysis to predict the amount of energy released by the trinity explosion, which was still classified information at the time. he did so, just by analyzing the images alone. he assumed the blast radius, r, depended only on the evolution time, t, the energy released, e, and the density of air, rho.
using the buckingham-pi theorem, find the dimensionless group, π1 = k, where k is a constant. assuming k = 1, find the energy released, in tons of tnt, if the radius of the blast wave at t = 0.025s is r = 140m. take the density of air to be rho = 1.2kg/m3. note, there are 4.184 × 109j per ton of tnt equivalent.
Answers: 2
Engineering, 06.07.2019 02:30, josediaz1124
Around steel bar, made from material with a yield stress of 750mpa, is loaded so that it has stresses co locations of maximum normal stress and maximum shear stress. use maximum shear stress and maximum distortion energy theories to calculate the safety factors for initial yielding failures.
Answers: 3
Engineering, 06.07.2019 03:10, liliauedt
Explain the strain-hardening phenomenon on the basis of dislocation - dislocation strain field interactions. also, briefly describe what generally happens to the ductility of a metal that has been strain hardened (i. e. does strain hardening make a metal more ductile or
Answers: 3
In 1945, the united states tested the world’s first atomic bomb in what was called the trinity test....
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