In a two-body collision, if the momentum of the system is conserved, then which of the following best describes the kinetic energy after the collision?
a. must be less
c. may also be conserved
b. must also be conserved
d. is doubled in value
C
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The Galileo spacecraft dropped a probe into Jupiter's atmosphere that survived to a depth of about 200 kilometers, or 0.3% of Jupiter's radius. Which is the deepest layer in which this probe was able to make measurements?
A) the gaseous hydrogen layer B) the liquid hydrogen layer C) the metallic hydrogen layer D) the core
The magnetic permeability of a ferromagnetic material is
A) much less than ?O. B) slightly less than ?O. C) much greater than ?O. D) the same as ?O. E) slightly more than ?O.
Seawater has a density of 1,025 
at the surface. The bulk modulus of seawater is 
What is the density of seawater at a depth of 10.00 km?
A. 1074 
B. 1230
C. 1574
D. 1764
E. 1973
There is a 10-A current through a wire for 2.0 min. (e = 1.60 × 10-19 C)
(a) How much charge has passed through this wire? (b) How many electrons have passed any point in the wire?