A black hole may be indirectly detected from radiation emitted by the ________ disk that surrounds it as matter is pulled inward
Fill in the blank(s) with correct word
accretion
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Kirchhoff's Rules: Determine the current in the 8.0-? resistor for the circuit shown in the figure. Assume that the batteries are ideal and that all numbers are accurate to two significant figures.
A. 0.28 A B. 1.3 A C. 1.6 A D. 2.1 A
Which of the following is not a nonmetal?
A) titanium (atomic no. = 22) B) sulfur (atomic no. = 16) C) selenium (atomic no. = 34) D) xenon (atomic no. = 54) E) helium (atomic no. = 2)
A physical pendulum is composed of a sphere whose center of gravity is attached to a thin rod. The sphere has a moment of inertia of 2/5 
The mass of the sphere is 2.00 kg and has a radius of 30.0 cm. The length of the rod is 50.0 cm. The period of the physical pendulum is
A. 2.45 sec. B. 2.02 sec. C. 1.98 sec. D. 1.52 sec. E. 1.25 sec.
Consider a toroidal coil, which is essentially a solenoid bent into a circle. The field created by such a coil is
A. unidirectional. B. circular. C. axial. D. None of the above.