Florence, who weighs 120. lbs, stands on a bathroom scale in an elevator. What will the scale read when the elevator is accelerating downward at 2.0 m/s2?
A) 86. lb
B) 1.4 × 102 lb
C) 1.2 × 102 lb
D) 96. lb
E) 1.56 × 102 lb
D
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Specific Heat: Object 1 has three times the specific heat capacity and four times the mass of Object 2. The two objects are given the same amount of heat. If the temperature of Object 1 changes by an amount ?T, the change in temperature of Object 2 will be
A. ?T.
B. 
?T.
C. 
?T.
D. 6?T.
E. 12?T.
PMMA is used as a substitute for _________where fracture resistance is required.
Fill in the blank(s) with the appropriate word(s).
The rotation of Uranus is peculiar in that
a. it is very slow, nearly zero. b. it is much faster than is typical for Jovian planets. c. it first turns in one direction, then stops and turns in the opposite direction. d. the axis is nearly parallel to the plane of its orbit.
The force P needed to hold the 2-m-radius circular arc gate in the position shown is nearest:
(A) 58 kN
(B) 49 kN
(C) 39 kN
(D) 27 kN