The mass of 12C is 12 u where 1 u = 1.660 559 × 10^?27 kg. This mass is equal to
a. the mass of the 12C nucleus.
b. the mass of the 12C nucleus plus 6 electrons.
c. the mass of the 12C nucleus plus 12 electrons.
d. the mass of 6 protons and 6 neutrons.
b
Physics & Space Science
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What is the current in the 10-? resistor?
?
?
A. 0.60 A B. 3.0 A C. 1.2 A D. 2.4 A E. 0.30 A
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A long nonconducting cylinder (radius = 6.0 mm) has a nonuniform volume charge density given by ?r2, where ? = 6.2 mC/m5 and r is the distance from the axis of the cylinder. What is the magnitude of the electric field at a point 2.0 mm from the axis?
a. 1.4 N/C b. 1.6 N/C c. 1.8 N/C d. 2.0 N/C e. 5.4 N/C
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