A light ray reflects from a surface. If the angle of incidence is 
what is the angle between the reflected ray and the incident ray at the surface?
a. 
b. 
c. 
d. 
e. 
d.
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A diver shines an underwater searchlight at the surface of a pond (n = 1.33). At what angle (relative to the surface) will the light be totally reflected?
a. 47.3° b. 41.2° c. 51.1° d. 58.7° e. 49.8°
For a rod in tension, what material class provides the highest specific critical-stress intensity factor?
(a) Steels (b) Titanium alloys (c) Aluminum alloys (d) Uni-ply composites (GFRP, CFRP, and KFRP)
What are the signs of Q, W, and ?U for the process 
?
A. 0, -, - B. 0, +, + C. +, -, 0 D. +, +, 0 E. -, +, 0 F. Other (specify)
The pressure inside a commercial airliner is maintained at 1 ATM (1.01 × 10^5 N/m2). What is the outward force exerted on a 1.0 m × 2.0 m cabin door if the outside pressure (at 10 km height) is 0.3 ATM?
a. 1.4 × 10^2 N b. 1.4 × 10^3 N c. 1.4 × 10^4 N d. 1.4 × 10^5 N e. 7.0 × 10^3 N