What two properties of Mercury imply that it is differentiated?
A) its size and magnetic field
B) its large average density and its surface features
C) its surface features and its size
D) its large average density and its magnetic field
E) its magnetic field and its surface features
D
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A 2.3 cm tall statue is 15. cm in front of a convex mirror. The mirror radius of curvature is 18. cm
(a) Is the image real or virtual? (b) How far is the image from the mirror? (c) Is the image upright or inverted? (d) How high is the image?
Which of the following is not evidence for plate tectonics on Earth?
A) Some continental boundaries fit together like pieces of a jigsaw puzzle. B) Similar rocks and fossils are found in different continents. C) high ocean ridges between the continents D) the existence of volcanoes E) earthquakes
An instrument is rated at 250 W if it is connected across a 120-V dc power supply
(a) What current does it draw under normal operation? (b) What is its resistance? (c) How many kilowatt-hours does it use in a day if it is left on all the time?
You observe a spiral galaxy with a large central bulge and tightly wrapped arms. It would be classified a
A) Sc. B) Sb. C) Sa. D) SO. E) E7.