A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC. What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
a. 22 V
b. 19 V
c. 16 V
d. 25 V
e. 12 V
C
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Compared to the size of the Sun, stars of all types range from
A) 0.5 to 50 solar radii. B) 0.1 to 10 solar radii. C) 0.01 to 1,000 solar radii. D) 0.08 to 8,000 solar radii. E) 0.001 to 50,000 solar radii.
A car starts from rest and accelerates uniformly at 3 m/s2. A second car starts from rest 6 s later at the same point and accelerates uniformly at 5 m/s2. How long does it take the second car to overtake the first car?
A) 24.0 s B) 12.2 s C) 35.0 s D) 18.9 s E) 22.7 s
A 150 W light bulb is designed for an ac voltage of 120 V rms. What is the resistance of the bulb?
A. 150 
B. 144
C. 96.0
D. 68.0
E. 48.0
Four different objects have spectra that peak in the wavelength regions listed below. Which peak wavelength region is associated with the coldest of the four objects?
A) x-rays B) visible light C) infrared D) ultraviolet