Brewster’s angle for a given interface is _______________ the critical angle for total internal reflection for the same interface.
A. always greater than
B. either greater than or less than.
C. always less than
D. always equal to
A. always greater than
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Molecular Speeds: An oxygen molecule, O2, falls in a vacuum. From what height must it fall so that its translational kinetic energy at the bottom of its fall equals the average translational kinetic energy of an oxygen molecule at 920 K? The mass of one O2 molecule is 5.312 × 10-26 kg, and the Boltzmann constant is 1.38 × 10-23 J/K. Neglect air resistance and assume that g remains constant at 9.8 m/s2 throughout the fall of the molecule.
A. 49 km B. 12 km C. 24 km D. 37 km E. 5.2 km
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A series RC circuit, which is made from a battery, a switch, a resistor, and a 3.45-?F capacitor, has a time constant of 11.0 ms. If an additional 12.0-?F is added in series to the 3.45-?F capacitor, what is the resulting time constant?
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