The mixing of which pair of the following atoms does not occur by vacancy diffusion?
(a) Gold and silver
(b) Copper and nickel
(c) Platinum and palladium
(d) Hydrogen and palladium
(d) Hydrogen and palladium
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If you double the amplitude of a harmonic oscillator, the object’s maximum speed does what?
A. Decreases by a factor of 2.
B. Decreases by a factor of 
.
C. Does not change.
D. Increases by a factor of .
E. Increases by a factor of 2.
F. Changes by some other factor (specify).
Contrast a hypernova and a type II supernova
What will be an ideal response?
Approximately how many pennies would you have to stack to reach an average 8-foot ceiling?
A) 2 × 103 B) 2 × 102 C) 2 × 104 D) 2 × 105 E) 2 x 106
The center of gravity is a useful point at which to balance an object. For instance, a ruler can be balanced by placing its center on your finger. Is it possible for the center of gravity of an object to be located at a point where no material exists to balance the object?
1.no, never 2.only for very unsymmetrical objects 3.It is possible in theory, but no objects have been found for which this occurs. 4.Yes, it is possible.