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WELCOME TO THE SCIENCE NATION .

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The OMG Particle

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On October 15, 1991, astronomers detected a particle going faster than anyone thought was possible. "Nobody ever thought you could concentrate so much energy into a single particle before," said David Kieda, an astrophysicist at the University of Utah. Enter the Oh-My-God particle—not to be confused with the God particle—the mysterious little cosmic ray that could. Probably. No Cosmic Speed limits Here : When this little particle racing at nearly the speed of light was detected in 1991, it took about a year for scientists to believe what they had observed. It was spotted in the sky above Utah by the crude Fly's Eye telescope array, and the signal appeared to break a cosmic speed limit. Quanta magazine puts that in perspective: "[The Oh-My-God particle] possessed 320 exa-electron volts (EeV) of energy, millions of times more than particles attain at the Large Hadron Collider, the most powerful accelerator ever built by humans. The particle was going so fas
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Problems on SHM

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Welcome guys .Here are some problems of SHM for those who are currently practising SHM. Q: A loudspeaker produces a musical sound by means of the oscillation of a diaphragm whose amplitude is limited to 1.00 μm. (a) At what frequency is the magnitude a of the diaphragm’s acceleration equal to g? (b) For greater frequencies, is ‘a’ greater than or less than g? Take g = 10 ms-2. Q: What is the phase constant for the harmonic oscillator with the velocity function v(t) given in figure if the position function x(t) has the form x = Acos (ωt +ф)? The vertical axis scale is set by vs = 4 cm/s. Q: The equation of motion of a particle started at t=0 is given by x = 10sin(10t + п/3), where x is in centimeter and t in second. When does the particle (a) first come to rest (b) first have zero acceleration (c) first have maximum speed? Q: Consider a simple harmonic motion of time period T. Calculate the time taken for the displacement to change value from half the amplitude to the
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