Brown dwarfs are
A) stars in the process of forming
B) very cool, low mass stars of spectral type M
C) the burnt out cores of dead stars
D) objects with insufficient mass to sustain nuclear fusion in their cores
D
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Lake Superior has a shoreline of length 2726 miles. What would be its area in 
if it were a perfectly circular lake? One mile is 1.609 km.
A. 
B. 
C. 
D. 
E. 
F. 
An object has a volume of 4.0 m3 and weighs 40,000 N. What will its apparent weight be in water of density 1000 kg/m3?
A) 40,000 N B) 39,200 N C) 9,800 N D) 800 N
For a metal to be drawn into shape, it must have a high
(a) Tensile strength (b) Yield strength (c) Strain-hardening rate (d) Ductility
Upon which point do Copernicus and Kepler disagree?
A) The Moon orbits the Earth. B) The Earth orbits the Sun. C) Retrograde motion occurs when one planet overtakes another. D) The orbits of the planets are ellipses, with one focus at the Sun. E) Venus will appear as a crescent when she retrogrades between us and the Sun.