The distributed loading on beam ABCD is to be replaced by a statically equivalent set of forces. The mag- nitude and location of the statically equivalent force on beam segment AB are:
(A) 575 lb, 4.1 ft
(B) 638 lb, 4.2 ft
(C) 740 lb, 3.9 ft
(D) 428 lb, 4.4 ft
(B) 638 lb, 4.2 ft
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A 4.00 kg hollow sphere of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. The acceleration of the center of mass of the hollow sphere is
A. 2.00 
B. 2.22
C. 2.50
D. 2.64
E. 2.94
The Sun traces a path along the ecliptic in a period that is longer than 365 days
a. True b. False Indicate whether the statement is true or false
If a light-weight stable nucleus has 12 neutrons, the atomic mass is expected to be about:
a. 6 b.12 c.18 d.24 e.36 amu.
A thermos bottle works well because:
A. its glass walls are thin B. silvering reduces convection C. vacuum reduces heat radiation D. silver coating is a poor heat conductor E. none of the above