Limestone is a common type of
A) metamorphic rock
B) meteoritic rock
C) igneous rock
D) sedimentary rock
D
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Projectile Motion: For general projectile motion with no air resistance, the horizontal component of a projectile's velocity
A. remains zero. B. remains a non-zero constant. C. continuously increases. D. continuously decreases. E. first decreases and then increases.
Photos A and B both show the same field of view containing a star-forming molecular cloud. One of the photos was taken in visible light and the other in infrared light. Which one is the visible-light photo, and how do you know?
A) Photo A is the visible-light photo, and we can tell because dust in the molecular cloud absorbs visible light, making the cloud appear dark. B) Photo A is the visible-light photo because its stars are more colorful. C) Photo B is the visible-light photo because more stars are visible in the molecular cloud. D) Photo B is the visible-light photo because the molecular cloud has a reddish tint.
A galvanometer measures
A) magnetic fields. B) electric current. C) electric voltage. D) none of the above
The Milky Way is simply our edge-on view of our home Galaxy
Indicate whether the statement is true or false