Potential of Point-Charges: Three point charges, -2.00 ?C, +4.00 ?C, and +6.00 ?C, are located along the x-axis as shown in the figure. What is the electric potential (relative to infinity) at point P due to these charges? (k = 1/4??0 = 8.99 × 109 N ? m2/C2) 
A. -307 kV
B. +307 k V
C. -154 kV
D. +154 kV
E. 0.00 kV
Answer: B
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Photoelectric Effect: What is the longest wavelength of electromagnetic radiation that will eject photoelectrons from sodium metal for which the work function is 2.28 eV? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A. 580 nm B. 499 nm C. 633 nm D. 668 nm E. 545 nm
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Indicate whether the statement is true or false
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What is the quantity used to measure an object's resistance to changes in rotational motion?
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