The asymmetrical surface markings on some of Saturn's moons are probably due to:
A) all of the moons are located within the rings and they sweep up ring particles.
B) the moons of Saturn are made primarily of ices.
C) in most cases, the moons are tidally locked by Saturn's gravity into synchronous rotation.
D) comet impacts become progressively harder as you get closer to Saturn.
E) most of the moons show signs of ice volcanism driven by tidal interactions.
C
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The chemical formula that represents the burning of wood or paper is
A) CO2 ? C+O2. B) C + O2 ? CO2. C) C + O ? CO. D) H2 + O ? H2O. E) C + H2O ? CH2O.
What are two advantages of large scopes over smaller ones?
A) Large scopes have a larger field of view and sharper focus. B) Large scopes are not subject to atmospheric turbulence and opacity like smaller ones. C) Large scopes are easier to mount and control than small ones. D) Large telescope have more light grasp and better resolution. E) Large telescopes give higher magnification and are easier to build.
The glass cover for a flat plate solar collector has a spectral transmissivity that may be approximated as shown in the figure. Determine the total effective transmissivity of the glass cover to solar radiation assuming the sun emits that of a blackbody at 5800 K.
GIVEN
• Glass cover for flat plate solar collector with transmissivity as shown.
• Solar radiation at 5800 K assuming it as blackbody.
FIND
• Total effective transmissivity of glass cover to solar radiation.
SKETCH
Zeros between non-zero numbers are significant
Indicate whether the statement is true or false