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Volumes by Slicing Calculator Online

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This calculator helps users determine the volume of a solid by applying methods such as the Disks and Washers Methods. These techniques are especially useful for calculating the volume of irregularly shaped solids and are widely used in academic and professional projects.

Formula of Volumes by Slicing Calculator

The calculator uses two primary formulas:

  • Volume by Disks Method: This method calculates the volume of a solid of revolution generated by rotating a function y = f(x) around the x-axis from x = a to x = b. The formula used is:V = pi * integral from a to b of [f(x)]^2 dx
  • Volume by Washers Method: This method is used for a solid of revolution generated by rotating the region between two functions y = f(x) and y = g(x) (where f(x) is greater than or equal to g(x)) around the x-axis from x = a to x = b. The formula is:V = pi * integral from a to b of ([f(x)]^2 – [g(x)]^2) dx
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These formulas calculate the volume by integrating the area of circular slices (disks or washers) along the axis of rotation.

Table of Useful Calculations

The following table provides pre-calculated volumes for some common functions using the Volumes by Slicing Calculator. These calculations are based on the disk method for simplicity and assume rotation around the x-axis. The table includes the function, the limits of integration a to b, and the calculated volume V (using Disk Method):

Function y = f(x)From aTo bCalculated Volume V (using Disk Method)
x^2010.628 (approximated as pi/5)
sqrt(x)046.693 (approximated as 32pi/15)
sin(x)0pi4.935 (approximated as pi^2/2)
e^x0114.801 (approximated as pi (e^2 – 1))

This table is particularly useful for educational purposes, allowing students and professionals to quickly verify their manual calculations or estimates.

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Example of Volumes by Slicing Calculator

Problem Statement: Calculate the volume of the solid formed by rotating the function y = sqrt(x) around the x-axis from x = 0 to x = 4.

Method Used: Volume by Disks Method, which involves the formula: V = pi * integral from a to b of [f(x)]^2 dx

Steps:

  1. Identify the function and limits:
    • Function f(x) = sqrt(x)
    • Limits are from a = 0 to b = 4
  2. Set up the integral:
    • The integral to calculate the volume V is: V = pi * integral from 0 to 4 of (sqrt(x))^2 dx = pi * integral from 0 to 4 of x dx
  3. Calculate the integral:
    • The integral of x from 0 to 4 is: Integral of x dx = (x^2 / 2) from 0 to 4 = (16/2) – (0/2) = 8
  4. Multiply by pi to find the volume:
    • The volume V = pi * 8 = 25.132 (approximately)
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Most Common FAQs

What functions can I use with the Volumes by Slicing Calculator?

Any continuous function can be used with this calculator, as long as the region of integration and the axis of rotation are clearly defined.

How accurate is the Volumes by Slicing Calculator?

The accuracy depends on the mathematical model and the integration technique used. The calculator is designed to provide a close approximation suitable for academic and professional use.

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