The acceleration of an object does not have to be in the same direction as the net force applied to it
Indicate whether the statement is true or false
FALSE
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A particle is moving at 0.86c. By what magnitude percentage is the Newtonian expression for momentum in error? (The percentage error is the difference between the erroneous and correct expressions, relative the correct one)
A) 49% B) 40% C) 55% D) 62%
In order that nuclear reactions will begin in the core of a protostar it must become
A. hot and of very low density B. hot and dense C. cold and dense D. cold and of very low density E. infinitely collapsed
A single slit is illuminated at normal incidence with a parallel beam of light having a wavelength of The entire central band of the diffraction pattern is observed at ±90°
The illumination is now replaced by a nonrelativistic beam of electrons, each having a kinetic energy of 980 eV. When this beam hits the slit at normal incidence, at what angle will the first minimum of the electron diffraction pattern occur? (h = 6.626 × 10-34 J ? s, mel = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19 J) A) 0.095 mrad B) 0.071 mrad C) 0.046 mrad D) 0.12 mrad E) 0.14 mrad
The Heisenberg uncertainty principle states that
A) Planck's constant sets a limit on accuracy of measurements. B) we can't simultaneously measure exactly both the position and momentum of a particle. C) we can't simultaneously measure exactly a particle's energy and time having that energy. D) all of the above