In which case will the woman see a just a spectrum that is almost entirely black except for few bright emission lines?
A) 1
B) 2
C) 3
D) 4
C) 3
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If gravity between the Sun and Earth suddenly vanished, Earth would move in
A) a curved path. B) an outward spiral path. C) an inward spiral path. D) a straight-line path.
What are Kepler's three laws of planetary motion?
What will be an ideal response?
An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 84 keV
Use the Heisenberg uncertainty principle to estimate the lifetime of this particle. ( h = 1.055 × 10-34 J • s = 6.59 × 10-16 eV • s)
The range of diameters and luminosities displayed by elliptical galaxies is ____
a. similar to the range of spirals, and smaller than spiral galaxies on average b. similar to the range of spirals, and about the same as spiral galaxies on average c. similar to the range of spirals, and larger than spiral galaxies on average d. wider than the range for spirals, extending to much larger sizes than spiral galaxies e. wider than the range for spirals, extending to much smaller sizes than spiral galaxies