In Figure 5.14, the mass of block C is closest to:
A) 5 kg
B) 7 kg
C) 9 kg
D) 11 kg
E) 13 kg
A
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Answer the following statement(s) true (T) or false (F)
1. In an electromagnetic wave, 
points in the direction that the wave is moving
Studies of a star's position made on the same calendar date over subsequent years yield ________
Fill in the blank(s) with correct word
A string is stretched and fixed at both ends, 200 cm apart. If the density of the string is 0.015 g/cm, and its tension is 600 N, what is the wavelength (in cm) of the first harmonic?
a. 600 b. 400 c. 800 d. 1 000 e. 200
Two infinite, uniformly charged, flat surfaces are mutually perpendicular. One of the sheets has a charge density of +60 pC/m2, and the other carries a charge density of -80 pC/m2 . What is the magnitude of the electric field at any point not on either surface?
a. 1.1 N/C b. 5.6 N/C c. 7.9 N/C d. 3.8 N/C e. 4.0 N/C