Physics, 25.12.2021 08:40 leelee85503
a particular guitar string is supposed to vibrate at 197 Hz, but is measured to actually vibrate at 205 Hz. By what percent should the tension in the string be changed to get the frequency to the correct value
Answers: 2
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What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?
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Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?
Answers: 1
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