Mass on a Spring: A 2.0-kg block on a frictionless table is connected to two springs whose opposite ends are fixed to walls, as shown in the figure. The springs have force constants (spring constants) k1 and k2. What is the oscillation angular frequency of the block if k1 = 7.6N/m and k2 = 5.0 N/m?
A. 2.5 rad/s
B. 3.5 rad/s
C. 0.40 rad/s
D. 0.56 rad/s
Answer: A
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A. must increase. B. must decrease. C. must remain constant. D. could either increase or decrease. There is no way to tell from the information given.
At t = 0, a particle leaves the origin with a velocity of 12 m/s in the positive x direction and moves in the xy plane with a constant acceleration of 
m/s2. At the instant the y coordinate of the particle is 18 m, what is the x coordinate of the particle?
A. 30 m B. 21 m C. 27 m D. 24 m E. 45 m
The dominant force at divergent boundaries is
A) compression. B) tension. C) shearing. D) similar to that in reverse faulting.
The Z0 boson is a mediator of weak interactions. It mass is 93 GeV/c2. About what is the range of this weak interaction?
A. 10-15m B. 10-18m C. 10-21m D. 10-24m E. 10-27m