It is 12:00 noon local solar time at 75°W. The date is March 21 . At which of the following longitudes would an observer be able to see the last-quarter moon rising?
a. 105°W
b. 75°E
c. 15°W
d. 105°E
d
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Describe some characteristics that all the planets seem to share and use the solar nebula theory to explain them
What will be an ideal response?
The Miller experiment created
a. life. b. artificial proteins. c. DNA. d. simple molds. e. amino acids.
Saturn is less dense than Jupiter
a. True b. False Indicate whether the statement is true or false
An enclosed chamber with sound absorbing walls has a 2.0 m × 1.0 m opening for an outside window. A loudspeaker is located outdoors, 78 m away and facing the window
The intensity level of the sound entering the window space from the loudspeaker is 79 dB. Assume the acoustic output of the loudspeaker is uniform in all directions and that the acoustic energy incident upon the ground is completely absorbed and therefore is not reflected into the window. The threshold of hearing is 1.0 × 10-12 W/m2. The acoustic power entering through the window space is closest to A) 160 µW. B) 79 µW. C) 320 µW. D) 790 µW. E) 1600 µW.