The Bohr theory does not predict that:
a. the approximate radius of a hydrogen atom is 5.3 × 10^-11 m.
b. hydrogen atoms will give off the lines from the series ending in the n = 2 state.
c. the ground state of hydrogen is spherically symmetric. d. it requires 13.6 eV to ionize hydrogen.
C
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Addition by Components: If vector has components Ax = -3.0 lb and Ay = -4.0 lb, and vector
has components Bx = 3.0 lb and By = -8.0 lb, what is the magnitude of vector
=
-
?
A. 13 lb B. 16 lb C. 140 lb D. 7.2 lb
Rotational Dynamics: A 385-g tile hangs from one end of a string that goes over a pulley with a moment of inertia of 0.0125 kg ? m2 and a radius of 15.0 cm. A mass of 710 g hangs from the other end of the string. When the tiles are released, the larger one accelerates downward while the lighter one accelerates upward. The pulley has no friction in its axle and turns without the string slipping. What is the tension in the string on the side of the 710-g tile?
A. 9.77 N B. 6.87 N C. 5.59 N D. 4.41 N E. 3.68 N
As a car moves forward on a level road at constant velocity, the total force acting on the tires is:
a. greater than the normal force times the coefficient of static friction. b. equal to the normal force times the coefficient of static friction. c. the normal force times the coefficient of kinetic friction. d. zero.
What is the maximum wavelength photon that can produce a pair of tau particles (rest mass 1.777 GeV/c2) by pair production?
A. 8.72 x 10-8nm B. 3.49 x 10-7nm C. 6.98 x 10-7nm D. 1.74 x 10-7nm