A black hole has
A) about the same mass as the original star from which it formed.
B) infinite mass.
C) about half the mass of the star from which it formed.
D) a mass that widely fluctuates.
Answer: A
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Because the changes in energy levels happen in discrete steps, we refer to these as ________ leaps
Fill in the blank(s) with correct word
The discovery of extrasolar planets indicates that planets around other stars are
A) all Earth-like B) nonexistent C) common D) relatively rare
Phase Angles: The phase angle in a series RL circuit at 1.0 kHz with a 0.20-k? resistor and a certain inductor is 40°. What is the inductance in this circuit?
A. 84 mH B. 74 mH C. 27 mH D. 37 mH E. 58 mH
The y-component of the electric field of an electromagnetic wave traveling in the +x direction through vacuum obeys the equation Ey = (375 N/C) cos[kx - (2.20 × 1014 rad/s)t]. (c = 3.0 x 108 m/s)
(a) What is the largest that the x-component of the wave can be? (b) What is the largest that the z-component of the wave can be?