What is the correct electronic configuration for the ground state sodium atom, which has 11 electrons?
A) 1s12s23p62s2
B) 1s22s22p63s2
C) 1s12s22p6
D) 1s22s13p62s2
E) 1s22s22p63s1
E
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Motional Emf: An electromagnetic flowmeter is useful when it is desirable not to interrupt the system in which the fluid is flowing (such as the blood in an artery during heart surgery). Such a device is illustrated in the figure. The conducting fluid moves with speed v in a tube of diameter d. Perpendicular to this tube is a magnetic field B. A voltage V is induced between opposite sides of the tube due to the motion of the conducting fluid in the magnetic field. For a certain case, B = 0.120 T, d = 1.2 cm, and the measured voltage is 10-3 = 2.88 mV. Determine the speed of the fluid. 
A. 2.0 m/s B. 11 m/s C. 0.075 m/s D. 1.1 m/s E. 750 m/s
By what mechanism does solar energy reach the Sun's photosphere from the layer just underneath it?
A) differentiation B) ionization C) radiation D) convection E) conduction
A self-sustained chain reaction occurs when the reproduction constant, K, is equal to
a. 3.0 b. 2.0 c. 2.5 d. 1.0 e. 0.5
If the polarizing angle for cubic zirconia (zirconium oxide) is 65.6°, what is the index of refraction of the material?
a. 1.84 b. 2.00 c. 2.20 d. 2.43 e. 1.17