The fact that a particle cannot be precisely localized is the
a. photoelectric effect
b. uncertainty principle
c. principle of a hologram
d. principle of a laser
e. reason why photons are emitted
B
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In a Newtonian fluid, the viscosity is equal to
(a) The applied shear stress divided by the shear strain. (b) The applied shear stress times the shear strain rate. (c) The shear strain rate divided by the applied shear stress. (d) The applied shear stress divided by the shear strain rate.
An RTG is
A. a type of bomb B. used in hospitals for power C. carried in pacemakers to supply power D. carried in satellites for power
Resolution: The pupil of a person's eye changes from a diameter of 3.5 mm to 1.5 mm as the illumination is increased. By what factor does the minimum angle of resolution change?
A. 0.43 B. 0.65 C. 2.0 D. 2.3
A catcher arranges to catch a baseball dropped from a height 50 m above his glove. However, his friends substitute a soft 250 g red grapefruit, so that it will smash apart when he catches it. His glove stops the grapefruit in 0.010 s. What force does the glove exert on the grapefruit?
a. 0.078 3 N b. 783 N c. 2 450 N d. 24 500 N e. 78 300 N