Thermosetting polymers are more brittle than thermoplastic polymers, because the long-chain molecules are _____________.
Fill in the blank(s) with the appropriate word(s).
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Instructions: On occasion, the notation 
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Exhibit 3-1
The three forces shown act on a particle.
Use this exhibit to answer the following question(s).
Refer to Exhibit 3-1. What is the magnitude of the resultant of these three forces?
A. 27.0 N
B. 33.2 N
C. 36.3 N
D. 23.8 N
E. 105 N
A 650-N billboard worker stands on a 4.00-m scaffold weighing 600 N and supported by vertical ropes at each end. How far would the worker stand from one of the supporting ropes to produce a tension of 660 N in that rope?
a. 1.78 m b. 2.00 m c. 1.90 m d. 0.06 m e. 0.93 m
An electron has a velocity of 6.0 × 10^6 m/s in the positive x direction at a point where the magnetic field has the components Bx = 3.0 T, By = 1.5 T, and Bz = 2.0 T. What is the magnitude of the acceleration of the electron at this point?
a. 2.1 × 10^18 m/s2 b. 1.6 × 10^18 m/s2 c. 2.6 × 10^18 m/s2 d. 3.2 × 10^18 m/s2 e. 3.7 × 10^18 m/s2
An object is oscillating on a spring with a period of 4.60 s. At time t = 0.00 s the object has zero speed and is at x = 8.30 cm. What is the acceleration of the object at t = 2.50 s?
A) 1.33 cm/s2 B) 0.784 cm/s2 C) 11.5 cm/s2 D) 14.9 cm/s2 E) 0.00 cm/s2