Calculating Total Length of Wraps Around A Cylinder So in this problem I am supposed to calculate the total length of a fabric wrapped around a cylinder I am given the following: Thickness of the fabric: t Cylinder diameter: c Total diameter of all of the fabric and the cylinder together: d I originally solved this problem by summing the
Volume of a cylindrical shell - Math Help Forum (a) Use differentials to find a formula for the approximate volume of a thin cylindrical shell with height h, inner radius r, and thickness \Delta r This
Equation of a cylinder in 3D - Math Help Forum How can I write the following inequality: A solid cylinder that lies on or below the plane z=10 and on or above the disk in the xy-plane with the center on the origin and radius of 2 I know the general equation of a cylinder is: (x a) 2 + (y b) 2 = r 2 How does the length of the cylinder factor into the above equation?
FINDING THE VOLUME OF A BEAD!!!! | Math Help Forum A spherical wood bead is formed by taking a sphere of radius 5 mm and drilling out a cylindrical hole The hole has a radius of 2 mm What is the volume of the resulting bead? i used the disk washer method and felt i did something wrong using the integral i got an answer of 21 2pie i
Geometry Problems | Math Help Forum Hey Phresh First off, do you know the formula for the area of a triangle (with ones that include right angles) and also the formula for a portion of a circle with a given radius and a known arc? I've been applying the formula for right triangles to both problems but I just can't get the right answer to any of them
Volume of a DNA Cylinder - Math Help Forum Assume DNA has the shape of a cylinder The cross-section is a circle with a diameter of 4 nm The vertical distance between two base pairs (nucleic acids on opposite DNA strands) is 4 Å Calculate the volume of a gene which encodes a protein sequence of 1,000 amino acids Compare this to
Archimedes Parabolic Area Formula | Math Help Forum The area under a parabolic curve = (2 3)bh Sketch the graph of the parabolic arch y = h- (4h b^2)x^2, (-b 2)=< x =< b 2 , assuming that h b are positive Then use calculus to find the area of the region enclosed between the arch and the x-axis I have no idea how to go about even starting to