Part of Pluto's orbit is inside the orbit of ______________
Fill in the blank(s) with correct word
Neptune
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The event horizon of a black hole is the point where _____
a. the mass of the black hole is concentrated in a singularity b. the accretion disk around the black hole contacts its surface c. the escape velocity equals the speed of light d. tidal forces ionize infalling gas e. an infalling particle reaches equilibrium with radiation pressure
An object is placed in front of a thin lens. Which statements are correct in describing the image formed by the lens?
A. If the lens is convex, the image will never be virtual. B. If the image is real, then it is also inverted. C. If the image is real, then it is also upright. D. If the lens is concave, the image must be virtual. E. If the lens is convex, the image must be real.
The figure shows a ‘snapshot’ of four different waves in identical ropes stretched with the same force
The wave with the largest wavelength is wave
a.
I.
b.
II.
c.
III.
d.
IV.
e.
all of the above
In a series LRC circuit, the frequency at which the circuit is at resonance is f0. If you double the resistance, the inductance, the capacitance, and the voltage amplitude of the ac source, what is the new resonance frequency?
A) f0 B) f0/4 C) 2 f0 D) f0/2 E) 4 f0