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Energetic proton Cosmic ray primary protons with energy up to 1020 eV (almost 10 J) have been detected. Our galaxy has a diameter of about 105 light years. (a) How long does it take the proton to traverse the galaxy, in its own rest frame (proper time)? (1 eV = 1.6 × 10-19 J, Mp = 1.67 × 10-27 kg.) What is the proper time for a photon to traverse our galaxy? (b) Compare the proton's energy to the kinetic energy of a baseball, mass = 145 g, traveling at 100 miles/hour.
A silicon nitride turbine rotor fractures at a stress level of 265 MPa. Estimate the range flaw sizes that could have been responsible for this failure.
find how long it takes for the center of the chicken to reach this temperature.
a mixture of methanol and methyl acetate contains 15.0wt methanol. using a single dimensional equation determine the
for a ballistic missile loaded with candy launched with the following conditions burnout altitude 200km burnout
a very thin and long pipeline used for the transport of crude oil is buried in the earth such that its centerline is a
Steam enters a two-stage adiabatic turbine at 8 MPa and 550ºC (State 1) and is expanded to 2 MPa (State 2) in the first stage of expansion. This steam is reheated at constant pressure to 550ºC (State 3) before entering the second stage of expansion. ..
a large pipe carries steam as a two-phase liquid-vapor miture at 1.0 mpa. a small quantity is withdrawn through a
a mass of 5kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder device at 100 kpa. initially
As shown, a 150 lb bungee jumper wants to jump from the top of a 630 ft high bridge and be able to just touch the water below. Given that the bungee cord has a spring constant of 108 lb/ft, what should the bungee cord's relaxed length, l, be for t..
helium gas in an ideal otto cycle is compressed from 12c and 2l to 0.25l and its temperature increases by an additional
a 9 m3 tank has two sections separated by a membrane both of which contain nitrogen gas. the nitrogen in section a has
What will the ratio of the angle of twist be to that of the hollow shaft if the maximum shear stress in the material of 75 N / mm ^2 and what is the ratio of actual permissible shear stress?
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