The ozone layer causes a temperature increase in the
a. thermosphere.
b. mesosphere.
c. troposphere.
d. stratosphere.
d
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As you saw in Part A, Io's elliptical orbit is necessary to its tidal heating. This elliptical orbit, in turn, is a result of the orbital resonance among Io, Europa, and Ganymede. This orbital resonance causes Io to have a more elliptical orbit than it would otherwise, because __________.
a. Europa and Ganymede are unusually large moons b. all three moons orbit with the same period, staying aligned at all times c. Europa and Ganymede always pull on Io from the same direction as Jupiter pulls on Io d. Io, Europa and Ganymede periodically return to the same orbital positions, creating the same gravitational tugs
As a spaceship is moving toward Earth, an Earthling measures its length to be 325 m,
while the captain on board radios that her spaceship's length is 1150 m. (c = 3.00 × 108 m/s) (a) How fast is the rocket moving relative to Earth? (b) What is the TOTAL energy of a 75.0-kg crewman as measured by (i) the captain in the rocket and (ii) the Earthling?
The energy of the ground state in the Bohr model is -13.6 eV. The energy of the n = 2 is
A) -3.4 eV. B) -6.8 eV. C) -1.7 eV. D) -13.6 eV. E) -4.5 eV.
Assume everyone in the United States consumes one soft drink in an aluminum can every two days. If there are 300 million Americans, how many tons of aluminum need to be recycled each year if each can weighs 1/16 pound, and one ton = 2000 pounds?
a. 750,000 tons c. 1.7 million tons b. 1.5 million tons d. 3 million tons