Which of the following lists the layers of a generic planetary atmosphere in the correct order from lowest to highest altitude?
A) troposphere, stratosphere, exosphere, thermosphere
B) thermosphere, troposphere, stratosphere, exosphere
C) stratosphere, troposphere, exosphere, thermosphere
D) stratosphere, thermosphere, troposphere, exosphere
E) exosphere, troposphere, stratosphere, thermosphere
B) thermosphere, troposphere, stratosphere, exosphere
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How can you identify an asteroid in a long exposure taken of stars through a telescope? (Assume the telescope is tracking the sky with Earth's rotation, so that stars appear as points of light.)
A) The asteroid will be much brighter than the surrounding stars. B) The asteroid will be much dimmer than the surrounding stars. C) The asteroid will appear as a streak because of its motion relative to the stars. D) The asteroid will have a noticeable circular disk, rather than being just a point of light like the stars. E) The asteroid will be recognizable by its long, fuzzy tail.
A metal has a work function of 4.50 eV. Find the maximum kinetic energy of the photoelectrons if light of wavelength 250 nm shines on the metal. (1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s)
A) 0.00 eV B) 0.37 eV C) 0.47 eV D) 0.53 eV
Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 4r. Moon A takes 20 days to complete one orbit. How long does it take moon B to complete an orbit?
A) 20 d B) 40 d C) 80 d D) 160 d E) 320 d
A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2.0 s. How high is the building, assuming no air?
A) 20 m B) 30 m C) 50 m D) 70 m