Gale Crater is the site of exploration for which Mars rover?
A) Spirit
B) Opportunity
C) Curiosity
D) Sojourner
C
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There must be equal amounts of mass on both sides of the center of mass (or center of gravity) of a system
A) True B) False
A simply supported beam with proportional loading (P 5 4.1 kN) has span length L 5 5 m. Load P is 1.2 m from support A and load 2P is 1.5 m from support B. The bending moment just left of load 2P is approximately:
(A) 5.7 kN?m
(B) 6.2 kN?m
(C) 9.1 kN?m
(D) 10.1 kN?m
Which of the following is most nearly the same as a gamma ray?
A) an alpha particle B) a beta ray C) visible light D) a proton E) a neutron
In the reaction below, what does the symbol ? mean?
OH- + NH4+ ? H2O + NH3 A) It means that the forward and backward reactions are happening at the same time. B) It means that the reaction cannot decide which way to go. C) It means that the forward reaction does not progress. D) It means that the backward reaction happens as fast as the forward reaction and so the proton is not transferred at all. E) none of the above