Find the velocity vector in terms of ur and u?.r = a(4 - cos ?) and 
= 7
A. v = 7a(4 - cos ?)ur + (7a sin ?)u?
B. v = (4a sin ?)ur + 4a(7 - cos ?)u?
C. v = (7a cos ?)ur + 7a(4 - sin ?)u?
D. v = (7a sin ?)ur + 7a(4 - cos ?)u?
Answer: D
Mathematics
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157.08 cubic millimeters of material was removed by drilling the blind hole shown in the illustration. Find the depth of the hole.
(The volume of a cylinder is given by 
)
?
?
?
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A. - 
B. 
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D. - 
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