A displacement vector D is given as 40.0 m long at an angle of 60.0 degrees EAST of NORTH. The 
component and the 
component of the vector are
A. 
= +34.6 m, 
= +20.0 m.
B. = +20.0 m, = -34.6 m.
C. = +20.0 m, = +34.6 m.
D. = -34.6 m,
= +20.0 m.
E. = +34.6 m,
= -20.0 m.
A. = +34.6 m, = +20.0 m.
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A cylindrical tank is assembled by welding steel sections in a heli-cal pattern with angle ? 5 50°. Tank diameter is 1.6 m, thickness is 20 mm, and internal pressure is 2.75 MPa. Modulus E 5 210 GPa and Poisson’s ratio ? 5 0.28. The normal stress acting perpendicular to the weld is approximately:
(A) 39 MPa
(B) 48 MPa
(C) 78 MPa
(D) 84 MPa
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Fill in the blank(s) with correct word
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