The addition of Na2O to SiO2 to form soda glass reduces the _____________of SiO2.
Fill in the blank(s) with the appropriate word(s).
viscosity
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A particle has a total energy that is less than that of a potential barrier. When the particle penetrates the barrier, its wave function is
a. a positive constant. b. exponentially increasing. c. oscillatory. d. exponentially decreasing. e. none of the above.
The Chandra X-ray telescope must use:
A) a lens of fluorite. B) grazing incidence optics to focus the short wavelengths. C) a Newtonian reflecting design to avoid chromatic aberration. D) X-ray film instead of CCDs for imaging. E) a Schmidt corrector plate to avoid spherical aberration.
Two charges that are separated by one meter exert 1-N forces on each other. If the magnitude of each charge is doubled, the force on each charge is
A) 1 N. B) 2 N. C) 4 N. D) 8 N. E) none of the above
In a relay race, runner A is carrying the baton and has a speed of 2.8 m/s. When he is 25 m behind the starting line, runner B starts from rest and accelerates at 0.080 m/s2. How fast is B traveling when A overtakes her?
A) 0.10 m/s B) 0.33 m/s C) 0.84 m/s D) 2.0 m/s E) Runner A never catches up.