What is the surface temperature of a star, given that its radiation peak occurs at a frequency of 1.86 × 1015 Hz?
A) 17,000 K
B) 14,500 K
C) 19,000 K
D) 20,400 K
E) 18,000 K
E
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What are the two geological features that appear to set Earth apart from all the other terrestrial worlds?
A) a dense core and plate tectonics B) mantle convection and a thick atmosphere C) significant volcanism and tectonics D) plate tectonics and widespread erosion
What's the fundamental reason that Mars, unlike the Earth, has become virtually geologically dead?
A) its farther distance than Earth to the Sun B) its rapid rotation compared to the Earth C) its closer distance than Earth to the Sun D) its small size compared to Earth E) its slow rotation compared to the Earth F) its large size compared to the Earth
How do the size and mass of Jupiter's core compare to the size and mass of Earth?
A) It is the same size and mass. B) It is about 10 times larger in size and the same mass. C) It is about the same size but is 10 times more massive. D) It is about 10 times larger both in size and mass. E) Jupiter doesn't have a core—it is made entirely from hydrogen and helium.
Consider a magnifying glass with a power of 3.0 diopters
(a) What is the maximum angular magnification for a person with a near point at 25 cm? (b) What is the angular magnification when viewing with a relaxed eye? What will be an ideal response?