A proton has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. This magnetic field must have a component
A) upward. B) to the east. C) to the west. D) downward. E) to the north.
B
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If the minimum x-ray wavelength produced is 17 × 10^?12 m, through what potential are the electrons accelerated in order to generate this radiation? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 eV = 1.60 × 10^?19 J)
a. 1.17E+5 V b. 2.44E+4 V c. 1.10E+4 V d. 7.31E+4 V e. 1.87E+5 V
Fundamental Forces: Which of the following statements is not true of the strong nuclear force?
A. The nuclear force has a short range, of the order of nuclear dimensions. B. For two protons that are very close together, the nuclear force and the electric force have about the same magnitudes. C. The nuclear force does not depend on charge. D. A nucleon in a large nucleus interacts via the nuclear force only with nearby nucleons, not with ones far away in the nucleus. E. The nuclear force affects both neutrons and protons.
In a gaseous mixture of hydrogen and oxygen, the molecules having the greater average kinetic energy are
A) hydrogen. B) oxygen. C) both the same D) not enough information
The maximum possible value for the coefficient of static friction is:
a. 0.50. b. 1.00. c. a value up to but not quite 1.00. d. greater than 1.00.