We get sucrose and water if we chemically combine
a. fructose and maltose.
b. glucose and fructose.
c. maltose and lactose.
d. glucose and lactose.
b
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In the Drake equation (Number of Civilizations = NHP × flife × fciv × fnow), we expect the term fciv to be small if ________
A) most of the civilizations that have ever existed are still out and about in the galaxy B) primitive life is common but intelligent life is rare C) most habitable planets never actually get life on them D) most civilizations destroy themselves within just a few hundred years of arising
The 
He nucleus is unstable. To what will it decay?
A. 
Li + e- +
B. 
Li + e- +
C. Li + e- + ?
D. Li + e-
E. 
H + e+ + ?
Two forces produce equal impulses, but the second force, F2, acts for a time twice that of the first force, F1. Which force, if either, is larger?
A. F1 B. they are the same C. F2
In vacuum, the components of an EM wave are
and 
0. What is the wavelength of the wave?
A. 5.00 m B. 0.200 m C. 1.26 m D. 2.52 m E. 0.796 m