In solving for the wave function for a finite potential well, which of the following is NOT required?
A)
The wave function be continuous.
B)
The first derivative of the wave function be continuous.
C)
There always be at least one bound state.
D)
The wave function be normalized.
E)
All of the above are required.
C
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Resistance and Resistivity: The resistivity of gold is 2.44 × 10-8 ? ? m at a temperature of 20°C. A gold wire that is 0.50 mm in diameter and 44 cm long carries a current of 380 mA. How many electrons each second pass a given cross section of the wire at 20°C? (e = 1.60 × 10-19 C)
A. 2.4 × 1018 B. 2.4 × 1017 C. 1.2 × 1022 D. 2.8 × 1014 E. 6.3 × 1015
Which of the following statements about sewage is not true?
A) All municipalities must treat sewage the same way. B) All municipalities must treat sewage. C) Once treated, sewage is released to the environment. D) Treated sewage becomes drinking water downstream. E) None of the above are true.
To calculate the pressure in the standard atmosphere at 6000 m, the lapse rate is used. The percentage error, considering the pressure is nearest:
(A) 0.08% (B) 0.13% (C) 0.24% (D) 0.31%
An automobile traveling along a straight road increases its speed from 30.0 m/s to 50.0 m/s in a distance of 180 m. If the acceleration is constant, how much time elapses while the auto moves this distance?
A. 6.00 s B. 4.50 s C. 3.60 s D. 4.00 s E. 9.00 s