The depth of the dip in a star's brightness due to the transit of a planet depends most directly on
A) the planet's density.
B) the eccentricity of the planet's orbit.
C) the planet's size.
D) the size of the planet's orbit.
E) the planet's mass.
C
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When a 125-kg piece of equipment is hung from a steel wire of length 75 cm, it stretches the wire by 4.00 mm. If instead the wire had a length of 150 cm, but all else were the same, by what distance would the same equipment stretch the wire?
A) 4.00 mm B) 8.00 mm C) 2.00 mm D) 16.0 mm E) 1.00 mm
The Swift satellite observes what portion of the electromagnetic spectrum?
A) gamma-ray B) X-ray C) ultraviolet D) optical E) All of the above
In the equation ac= v2/r for centripetal acceleration, the v stands for
a. volume. b. very. c. speed. d. velociraptor.
A hologram is simply a
A) complex diffraction grating. B) thin sheet of non-cubic transparent crystals. C) pair of semi-crossed polarization filters. D) thin photographic film with microscopic images over the entire surface. E) none of the above