The grooves and ridges on Ganymede are thought to
A) be due to the moon's rapid rotation.
B) have grown considerably larger since the Voyager spacecraft discovered them.
C) be part of an ongoing volcanic process.
D) be due to crustal tectonics motion (plate tectonics).
E) have formed within the last thousand years.
D
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A contact lens is made of plastic with an index of refraction 1.50 . The lens has an outer radius of curvature of + 1.65 cm and an inner radius of curvature of + 5.85 cm. What is its focal length?
a. –4.60 cm b. +1.53 cm c. +2.57 cm d. +4.60 cm e. –2.57 cm
Jack and Mary view the same microorganism through the same compound microscope. Mary's near point distance, NM, is twice as large as Jack's near point distance, NJ
If Mary sees the microorganism with magnification MM, with what magnification does Jack see it? A) 8 MM B) MM/4 C) MM/2 D) 4 MM E) 2 MM
In a Young's experiment, the paths from the slits to a point on the screen differ in length, causing destructive interference at the point. Which of the following path differences would cause this destructive interference?
a. 3l/2 c. 5l b. 4l d. None of these choices.
A force of 1 N accelerates 1-kg box at the rate of 1 m/s2. The acceleration of a 2-kg box by a net force of 2 N is
A) half as much. B) twice as much. C) the same. D) none of the above