If one uses the classical expression for kinetic energy (1/2 m v2 ) for a particle traveling at half the speed of light, the result will be deficient by how many percent?
A) 13%
B) 7%
C) 1%
D) 24%
E) 27%
D
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Elements above hydrogen and helium come from _____
a. the early stages of the Universe, before the formation of stars and galaxies b. the collision of neutron stars and black holes c. cooling and accretion of molecules in dense molecular clouds d. the last phases of stellar evolution and stellar "death" e. matter falling into supermassive black holes
A negatively-charged particle is slowly moving as it enters a region that has a constant magnetic field. If the velocity of the particle is initially perpendicular to the magnetic field, what will be the subsequent motion of the particle?
a) It will follow a helical path around the magnetic field lines. b) It will follow a circular path in the plane perpendicular to the magnetic field lines. c) It will follow a straight line path in the same direction as it was initially traveling. d) It will follow a circular path in a plane parallel to the magnetic field lines. e) It is impossible to predict the path the particle will follow.
Four electrons move from point A to point B in a uniform electric field as shown below. Rank the electrons in diagrams I through IV by the changes in potential energy from most positive to most negative when traveling from A to B.
A. I = II = III = IV. B. II = III > I > IV. C. III > I = IV > II. D. II > I = IV > III. E. I > II = III > IV.
The deepest point of the Pacific Ocean is 11,033 m, in the Mariana Trench. What is the water pressure at that point? The density of seawater is 1025 kg/m3
A) 1.13 × 107 Pa B) 2.18 × 105 Pa C) 1.11 × 104 Pa D) 1.11 × 108 Pa E) 1.09 × 105 Pa