Exam 7: Applications of the Integral

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Let V be the volume of the solid that lies between planes perpendicular to the x-axis from x = 0 to x = 3. The cross-sections of this solid perpendicular to the x-axis run from y=x29y = \frac { x ^ { 2 } } { 9 } to y=x3y = \sqrt { \frac { x } { 3 } } and they are semicircles with diameters in the xy-plane. Then V is

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Let A denote the area enclosed by the equation y=4xy = 4 - | x | and the x-axis. Then A is

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A bucket weighing 10 pounds containing 30 pounds of sand is attached to the lower end of a chain of 100 feet long and weighs 10 pounds. The work done to lift the bucket to the top, in foot-pounds, is

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A trough cross-section is a 2-foot-high and 2-foot-wide rectangle. If the trough is filled with water of density 62.5 pounds per cubic foot, the force, in pounds, due to hydrostatic pressure on one end of the trough is

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Let V be the volume of the solid generated by revolving the region enclosed by about the y-axis. Then V is

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Let V be the volume of the solid generated by revolving the region enclosed by x = y2, x = 2y - y2; about the x-axis. Then V is

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Let A denote the area enclosed by the equations y=x2y = x ^ { 2 } and y=6xx2y = 6 x - x ^ { 2 } Then A is

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Let yˉ\bar { y } denote the y-coordinate of the centroid of the region enclosed by y=1x2y = 1 - x ^ { 2 } and y=0y = 0 Then yˉ\bar { y } =

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The work done by a variable force F(x)=40xF ( x ) = 40 - x Newtons that moves an object along a straight line in the direction of F from x = 5 meters to x = 20 meters, in Newton-meters, is

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Let A denote the area enclosed by the equation y=sinxy = \sin x and the x-axis with x[0,π]x \in [ 0 , \pi ] Then A is

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Let A denote the area enclosed by the equations y = x3 and y = x. Then A is

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The arc length of y=(x2)321 for x[3,6]y = ( x - 2 ) ^ { \frac { 3 } { 2 } } - 1 \text { for } x \in [ 3,6 ] is

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Let V be the volume of the solid generated by revolving the region enclosed by y=3x2,y = 3 x ^ { 2 }, the x-axis, x=1;x = 1 ; about the x-axis. Then V is

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Let V be the volume of the solid generated by revolving the region enclosed by y=sinx,y = \sqrt { \sin x }, the y-axis, about the x-axis. Then V is

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A right circular cylindrical water tank with height 5 meters and radius 2 meters is filled with water with density 1000 kg per cubic meter, which is 3 meters deep. The work done, in kg-meters, to remove the water from the tank is

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Let V be the volume of the solid generated by revolving the region enclosed by x = y3, x = 2y2 - y3; about the x-axis. Then V is

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A cylindrical sewer pipe of radius 2 feet is half full of water of density 62.5 pounds per cubic foot. A gate used to seal off the sewer is placed perpendicular to the pipe opening. The force, in pounds, due to hydrostatic pressure on one end of the gate is

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Let xˉ\bar { x } denote the x-coordinate of the centroid of the region enclosed by x=2yy2x = 2 y - y ^ { 2 } and x=0.x = 0 . Then xˉ\bar { x } =

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A trough cross-section is a 4-foot-high and 2-foot-wide rectangle. If the trough is filled with water of density 62.5 pounds per cubic foot, the force, in pounds, due to hydrostatic pressure on one end of the trough is ​

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Let V be the volume of the solid generated by revolving the region enclosed by x = -y2, x = y2 - 2y; about the x-axis. Then V is

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