Capacitors in Combination: Three capacitors of equal capacitance are arranged as shown in the figure, with a voltage source across the combination. If the voltage drop across C1 is 10.0 V, what is the voltage drop across C3?
A. 20 V
B. 10.0 V
C. 40 V
D. 30 V
Answer: A
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?Suppose a particle is moving along a straight line with a speed v for a time t, then stops for a time t, and then resumes moving along the original direction with speed v for time t. What has been the average speed of the particle for the total time period 3t?
A) v
B) 
C) 1.5v
D) 
Photoelectric Effect: What is the longest wavelength of light that can cause photoelectron emission from a metal that has a work function of 2.20 eV? (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A. 417 nm B. 257 nm C. 344 nm D. 565 nm E. 610 nm
Wave Characteristics: How long does it take light to travel 1.0 m? (c = 3.0 × 108 m/s)
A. 3.3 ns B. 3.3 ?s C. 3.3 ms D. 3.3 s
How many atoms of oxygen are contained in 44 g of carbon dioxide, CO2?
a. 3.01 × 10^23 b. 12.0 × 10^23 c. 6.02 × 10^23 d. None of these