Of the Galilean moons, the one with striking grooved terrain and icy tectonic features as well as older craters is
A) Amalthea.
B) Io.
C) Europa.
D) Ganymede.
E) Callisto.
D
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The finite disk shown below has a uniformly distributed positive charge. Which of the arrows in figure E2.12 best indicates the direction of the electric field vector that the plate produces at the points specified? 
At point P1 a small distance above the disk’s center?
A. A B. B C. C D. D E. AA F. BB G. CC H. DD
Two point charges of + 40.0 ?C and - 10.0 ?C are separated by a distance of 20.0 cm. A +7.00 ?C charge is placed midway between these two charges. What is the electric force acting on this charge because of the other two charges?
A) 0.453 N directed towards the negative charge B) 3.15 N directed towards the negative charge C) 3.15 N directed towards the positive charge D) 315 N directed towards the positive charge E) 315 N directed towards the negative charge
How do we specify the location of a star on the celestial sphere?
Absorption lines in the spectra of supergiant stars are broader than the same spectral lines in main sequence stars of the same spectral type
Indicate whether the statement is true or false