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
Suppose that we allow an ideal gas containing N molecules to expand slowly and adiabatically to twice its initial volume. By what factor does its multiplicity increase?
A. By a factor of 2. B. By a factor of 2N. C. The multiplicity does not change. D. The answer depends on the gas’s initial volume. E. The answer depends on the gas’s initial energy.
Explain the purpose of white space in design. How do you create it? Is it always white?
What will be an ideal response?
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?
a. 38.3 ms b. 8.54 ms c. 1.19 ms d. 14.2 ms e. This cannot be found without the value of the resistance being given.