Imagine that an electron with an initial spin state 
goes into an SGx device and comes out the – channel of that device. The electron’s spin state is now
A. 
B. 
C. 
D. 
E. 
C.
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Radioactivity Basics: Scandium 
Sc decays by emitting a positron. What isotope is the product of this decay?
A. 
Sc
B. 
Sc
C. 
Ca
D. 
Ca
E. 
Ti
The rms speed of a certain sample of carbon dioxide molecules, with a molecular weight of 44g/mole, is 396 m/s. What is the rms speed of water molecules, with a molecular weight of 18 g/mol, at the same temperature?
A) 253 m/s B) 387 m/s C) 421 m/s D) 506 m/s E) 619 m/s
A 3.0 ? resistor is connected in parallel with a 6.0 ? resistor. This combination is connected in series with a 4.0 ? resistor. The resistors are connected to a 12. volt battery. How much power is dissipated in the 3.0 ? resistor?
A) 12 W B) 5.3 W C) 7.7 W D) 6 W E) 2.7 W
The planetary model of the hydrogen atom consists of an electron in a circular orbit about a proton. The motion of the electron of charge 1.60 × 10^?19 C creates an electric current. The radius of the electron orbit is 5.30 × 10^?11 m and the electron's velocity is 2.20 × 10^6 m/s. What is the magnetic field strength at the location of the proton?