CalculusLesson 2 of 5 in the course Applications of integration

Volume: Measurement, Solid Geometry, and Integral Methods

4 flashcards · 5 quiz questions · 5 match pairs · 4 fill-in sentences · English

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Summary

Volume is a measure of a region in three-dimensional space. Because it extends across three dimensions, its unit is a length unit cubed. For example, if length is measured in metres, volume is measured in cubic metres, or m3\text{m}^3.

Volume is nonnegative: a physical region cannot have negative volume. Volumes can be compared and added. A region can also be divided into smaller regions, an idea that becomes important in integral calculus. A point, line, or flat surface has no three-dimensional volume. In four or more dimensions, the analogous concept is called hypervolume.

All flashcards

Capacity
The maximum volume a container can hold.
Cylinder volume
For radius rr and perpendicular height hh, V=πr2hV=\pi r^2h.
Volume mesh
A model representing an object's interior volume and relevant surface properties.
Volumetric flow rate
The volume of fluid passing through a surface per unit time.

Quiz questions

  1. What does the capacity of a container describe?Answer: The maximum volume the container can hold.
  2. Which equation relates mass mm, density ρ\rho, and volume VV?Answer: m=ρVm=\rho V
  3. A cuboid measures 4 cm4\,\text{cm} by 3 cm3\,\text{cm} by 2 cm2\,\text{cm}. What is its volume?Answer: 24 cm324\,\text{cm}^3
  4. In cylindrical coordinates (r,θ,z)(r,\theta,z), which expression gives the volume element?Answer: r dr dθ dzr\,dr\,d\theta\,dz
  5. A plane region between radii R(x)R(x) and r(x)r(x) is revolved about the xx-axis. Which expression gives its washer-method volume?Answer: π∫ab(R(x)2−r(x)2) dx\pi\int_a^b\left(R(x)^2-r(x)^2\right)\,dx

Based on the Wikipedia article Volume, licensed CC BY-SA 4.0. Adapted into a summary, flashcards and quizzes.

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