Which of the following best describes the surface of Europa?
A) The surface is comprised of ice with many cracks in it.
B) The surface is comprised of very smooth ice.
C) The surface is covered by a liquid water ocean.
D) The surface is rocky and dry.
E) The surface is covered in liquid methane.
A) The surface is comprised of ice with many cracks in it.
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Hypernovae are
a. supernovae that occur when two red dwarfs collide. b. supernovae that occur when 10 solar mass stars explode. c. supernovae that occur when stars more massive than 25 solar masses explode. d. one theory to explain the production of gamma ray bursters. e. both c and d above
A long wire is known to have a radius greater than 4.0 mm and to carry a current uniformly distributed over its cross section. If the magnitude of the magnetic field is 0.285 mT at a point 4.0 mm from the axis of the wire and 0.200 mT at a point 10 mm from the axis, what is the radius of the wire?
a. 4.6 mm b. 7.1 mm c. 5.3 mm d. 12 mm e. 10 mm
The _____ of an object is a measure of the amount of matter in the object
A) weight B) mass C) height D) velocity
How many arc seconds are in a degree?
A) 60 B) 3600 C) 600 D) 86400 E) None; seconds measure time and degrees measure temperature.