The inner planets are composed of ____
a. rock and ice
b. ice and gas
c. rock and gas
d. metal and ice
e. rock and metal
e
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Uranus and Neptune appear blue or blue-green because
a. their atmospheres absorb blue light very efficiently. b. their solid air-less surfaces are this color c. their surfaces are covered with liquid water with no atmosphere d. traces of methane in their atmospheres absorb red light very efficiently.
What do the size and distribution of small scale temperature variations suggest about the geometry of the Universe?
What will be an ideal response?
A positive ion has
a. More electrons than protons. b. More protons than electrons. c. A +1 charge always. d. One proton.
A stone is thrown with an initial speed of 11.5 m/s at an angle of 50.0 above the horizontal from the top of a 30.0-m-tall building. Assume air resistance is negligible, and g = 9.8 m/s2. What is the magnitude of the vertical-velocity component of the rock as it hits the ground?
a. 7.39 m/s b. bonus question c. What is the magnitude of the horizontal displacement of the rock? d. 26.1 m