BuyFindarrow_forward

Calculus

10th Edition
Ron Larson + 1 other
ISBN: 9781285057095

Solutions

Chapter
Section
BuyFindarrow_forward

Calculus

10th Edition
Ron Larson + 1 other
ISBN: 9781285057095
Textbook Problem

Using an Ellipse Consider the region bounded by the ellipse

x 2 a 2 + y 2 b 2 = 1

with eccentricity e = c / a .

(a) Show that the solid (oblate spheroid) generated by revolving the region about the minor axis of the ellipse has a volume of V = 4 π 2 b / 3 and a surface area of

S = 2 π a 2 + π ( b 2 e ) ln ( 1 + e 1 e ) .

(b) Show that the solid (prolate spheroid) generated by revolving the region about the major axis of the ellipse has a volume of V = 4 π a b 2 / 3 and a surface area of

S = 2 π b 2 + 2 π ( a b e ) arcsin e .

(a)

To determine

To prove: The volume of a solid generated by revolving the region about the minor axis is V=4πa2b3 and surface area for the same solid is S=2πa2+π(b2e)ln(1+e1e).

Explanation

Given:

The provided equation of ellipse:

x2a2+y2b2=1

The eccentricity of the ellipse is:

e=ca

Formula used:

The disk integration is given as:

V=πx1x2f2(x)dx

The symmetrical property of integration is as given below:

aaf(x)dx=20af(x)dx

The property of integral is as given below:

(a+b)dx=adx+bdx

The formula for eccentricity of an ellipse is:

e=1b2a2

The integration formula for nth power of secant function is:

secnθdθ=n2n1secn2θdθ+secn2θtanθn1

Proof:

The equation of ellipse is:

x2a2+y2b2=1

Assume b be the minor axis.

Rearrange the ellipse equation as below:

x2a2+y2b2=1x2a2=1y2b2x2=a2(b2y2b2) .

x2=a2b2(b2y2) …...…... (1)

Using disk integration, find the volume:

πbbx2dy=2π0ba2b2(b2y2)dy=2πa2b20b(b2y2)dy=2πa2b2(0bb2dy0by2dy)

Integrate the integrals as follows:

2πa2b2(0bb2dy0by2dy)=2πa2b2(b2[y]0b[y33]0b)=2πa2b2(b2×b13(b3))=2πa2b2(3b3b33)=2πa2b2×2b33

On simplifying the above equation:

2πa2b2×2b33=43πa2b

Hence, the volume of the ellipse is 43πa2b.

Take square root on both the sides of equation (1):

x2=a2b2(b2y2)x=abb2y2

Differentiate x=abb2y2 with respect to y:

dxdy=ddy(abb2y2)=abddy(b2y2)=ab×12b2y2(2y)=aybb2y2

Let ds be the small element of the surface of an ellipse, which can be written as:

ds=1+(dxdy)2dy

Substitute the values of dxdy=aybb2y2 in the above equation:

1+(dxdy)2dy=1+(aybb2y2)2dy=1+a2y2b2(b2y2)dy=b2(b2y2)+a2y2b2(b2y2)dy=b4b2y2+a2y2bb2y2dy

Now, the surface area along yaxis is:

s=4π0bxds

Substitute the values x=abb2y2 and ds=b4b2y2+a2y2bb2y2dy in the above equation:

s=4π0bxds=4π0babb2y2×b4b2y2+a2y2bb2y2dy=4π0bab2b4b2y2+a2y2dy=4πab20b(b4b2y2+a2y2)dy

On simplifying the above equation:

4πab20b(b4b2y2+a2y2)dy=4πab20b(b4+y2(a2b2))dy

Simplify the above integral as below:

For ellipse,

Centre of ellipse c2=a2b2. So,

4πab20b(b4+y2(a2b2))dy=4πab20b(b4+y2c2)dy …...…..

(b)

To determine

To prove: The volume of the solid generated by revolving the region about the major axis of the ellipse is V=4πab23 and surface area of the same solid is S=2πb2+2π(abe)sin1e.

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Chapter 10 Solutions

Show all chapter solutions add
Sect-10.1 P-11ESect-10.1 P-12ESect-10.1 P-13ESect-10.1 P-14ESect-10.1 P-15ESect-10.1 P-16ESect-10.1 P-17ESect-10.1 P-18ESect-10.1 P-19ESect-10.1 P-20ESect-10.1 P-21ESect-10.1 P-22ESect-10.1 P-23ESect-10.1 P-24ESect-10.1 P-25ESect-10.1 P-26ESect-10.1 P-27ESect-10.1 P-28ESect-10.1 P-29ESect-10.1 P-30ESect-10.1 P-31ESect-10.1 P-32ESect-10.1 P-33ESect-10.1 P-34ESect-10.1 P-35ESect-10.1 P-36ESect-10.1 P-37ESect-10.1 P-38ESect-10.1 P-39ESect-10.1 P-40ESect-10.1 P-41ESect-10.1 P-42ESect-10.1 P-43ESect-10.1 P-44ESect-10.1 P-45ESect-10.1 P-46ESect-10.1 P-47ESect-10.1 P-48ESect-10.1 P-49ESect-10.1 P-50ESect-10.1 P-53ESect-10.1 P-51ESect-10.1 P-52ESect-10.1 P-57ESect-10.1 P-58ESect-10.1 P-55ESect-10.1 P-54ESect-10.1 P-63ESect-10.1 P-69ESect-10.1 P-56ESect-10.1 P-59ESect-10.1 P-60ESect-10.1 P-61ESect-10.1 P-62ESect-10.1 P-64ESect-10.1 P-65ESect-10.1 P-66ESect-10.1 P-67ESect-10.1 P-68ESect-10.1 P-70ESect-10.1 P-71ESect-10.1 P-72ESect-10.1 P-73ESect-10.1 P-74ESect-10.1 P-75ESect-10.1 P-76ESect-10.1 P-77ESect-10.1 P-78ESect-10.1 P-79ESect-10.1 P-80ESect-10.1 P-81ESect-10.1 P-82ESect-10.1 P-83ESect-10.1 P-84ESect-10.1 P-85ESect-10.1 P-86ESect-10.1 P-87ESect-10.1 P-88ESect-10.1 P-89ESect-10.1 P-90ESect-10.1 P-91ESect-10.1 P-92ESect-10.1 P-93ESect-10.1 P-94ESect-10.1 P-95ESect-10.1 P-96ESect-10.1 P-97ESect-10.1 P-98ESect-10.2 P-1ESect-10.2 P-2ESect-10.2 P-3ESect-10.2 P-4ESect-10.2 P-5ESect-10.2 P-6ESect-10.2 P-7ESect-10.2 P-8ESect-10.2 P-9ESect-10.2 P-10ESect-10.2 P-11ESect-10.2 P-12ESect-10.2 P-13ESect-10.2 P-14ESect-10.2 P-15ESect-10.2 P-16ESect-10.2 P-17ESect-10.2 P-18ESect-10.2 P-19ESect-10.2 P-20ESect-10.2 P-21ESect-10.2 P-22ESect-10.2 P-23ESect-10.2 P-24ESect-10.2 P-25ESect-10.2 P-26ESect-10.2 P-27ESect-10.2 P-28ESect-10.2 P-29ESect-10.2 P-30ESect-10.2 P-31ESect-10.2 P-32ESect-10.2 P-33ESect-10.2 P-34ESect-10.2 P-35ESect-10.2 P-36ESect-10.2 P-37ESect-10.2 P-38ESect-10.2 P-39ESect-10.2 P-40ESect-10.2 P-41ESect-10.2 P-42ESect-10.2 P-43ESect-10.2 P-44ESect-10.2 P-45ESect-10.2 P-46ESect-10.2 P-47ESect-10.2 P-48ESect-10.2 P-49ESect-10.2 P-50ESect-10.2 P-51ESect-10.2 P-52ESect-10.2 P-53ESect-10.2 P-54ESect-10.2 P-55ESect-10.2 P-56ESect-10.2 P-57ESect-10.2 P-58ESect-10.2 P-59ESect-10.2 P-60ESect-10.2 P-61ESect-10.2 P-62ESect-10.2 P-63ESect-10.2 P-64ESect-10.2 P-65ESect-10.2 P-66ESect-10.2 P-67ESect-10.2 P-68ESect-10.2 P-69ESect-10.2 P-70ESect-10.2 P-71ESect-10.2 P-72ESect-10.2 P-73ESect-10.2 P-74ESect-10.2 P-75ESect-10.2 P-76ESect-10.2 P-77ESect-10.2 P-78ESect-10.2 P-79ESect-10.2 P-80ESect-10.3 P-1ESect-10.3 P-2ESect-10.3 P-3ESect-10.3 P-4ESect-10.3 P-5ESect-10.3 P-6ESect-10.3 P-7ESect-10.3 P-8ESect-10.3 P-9ESect-10.3 P-10ESect-10.3 P-11ESect-10.3 P-12ESect-10.3 P-13ESect-10.3 P-14ESect-10.3 P-15ESect-10.3 P-16ESect-10.3 P-17ESect-10.3 P-18ESect-10.3 P-19ESect-10.3 P-20ESect-10.3 P-21ESect-10.3 P-22ESect-10.3 P-23ESect-10.3 P-24ESect-10.3 P-25ESect-10.3 P-26ESect-10.3 P-27ESect-10.3 P-28ESect-10.3 P-29ESect-10.3 P-30ESect-10.3 P-32ESect-10.3 P-31ESect-10.3 P-33ESect-10.3 P-34ESect-10.3 P-35ESect-10.3 P-37ESect-10.3 P-36ESect-10.3 P-38ESect-10.3 P-39ESect-10.3 P-40ESect-10.3 P-41ESect-10.3 P-42ESect-10.3 P-43ESect-10.3 P-44ESect-10.3 P-45ESect-10.3 P-46ESect-10.3 P-47ESect-10.3 P-48ESect-10.3 P-49ESect-10.3 P-50ESect-10.3 P-51ESect-10.3 P-54ESect-10.3 P-53ESect-10.3 P-52ESect-10.3 P-55ESect-10.3 P-56ESect-10.3 P-57ESect-10.3 P-58ESect-10.3 P-59ESect-10.3 P-60ESect-10.3 P-65ESect-10.3 P-66ESect-10.3 P-67ESect-10.3 P-68ESect-10.3 P-69ESect-10.3 P-70ESect-10.3 P-61ESect-10.3 P-62ESect-10.3 P-63ESect-10.3 P-64ESect-10.3 P-71ESect-10.3 P-72ESect-10.3 P-73ESect-10.3 P-74ESect-10.3 P-75ESect-10.3 P-76ESect-10.3 P-77ESect-10.3 P-78ESect-10.3 P-79ESect-10.3 P-80ESect-10.3 P-81ESect-10.3 P-82ESect-10.3 P-83ESect-10.3 P-84ESect-10.3 P-85ESect-10.3 P-86ESect-10.3 P-87ESect-10.3 P-88ESect-10.3 P-89ESect-10.3 P-90ESect-10.3 P-91ESect-10.3 P-92ESect-10.3 P-93ESect-10.3 P-94ESect-10.3 P-95ESect-10.3 P-96ESect-10.3 P-97ESect-10.3 P-98ESect-10.4 P-1ESect-10.4 P-2ESect-10.4 P-3ESect-10.4 P-4ESect-10.4 P-5ESect-10.4 P-6ESect-10.4 P-7ESect-10.4 P-8ESect-10.4 P-9ESect-10.4 P-10ESect-10.4 P-11ESect-10.4 P-12ESect-10.4 P-13ESect-10.4 P-14ESect-10.4 P-15ESect-10.4 P-16ESect-10.4 P-17ESect-10.4 P-18ESect-10.4 P-19ESect-10.4 P-20ESect-10.4 P-21ESect-10.4 P-22ESect-10.4 P-23ESect-10.4 P-24ESect-10.4 P-25ESect-10.4 P-26ESect-10.4 P-27ESect-10.4 P-28ESect-10.4 P-29ESect-10.4 P-30ESect-10.4 P-31ESect-10.4 P-32ESect-10.4 P-33ESect-10.4 P-34ESect-10.4 P-35ESect-10.4 P-36ESect-10.4 P-37ESect-10.4 P-38ESect-10.4 P-39ESect-10.4 P-40ESect-10.4 P-41ESect-10.4 P-42ESect-10.4 P-43ESect-10.4 P-44ESect-10.4 P-45ESect-10.4 P-46ESect-10.4 P-47ESect-10.4 P-48ESect-10.4 P-49ESect-10.4 P-50ESect-10.4 P-51ESect-10.4 P-52ESect-10.4 P-53ESect-10.4 P-96ESect-10.4 P-97ESect-10.4 P-54ESect-10.4 P-55ESect-10.4 P-56ESect-10.4 P-57ESect-10.4 P-58ESect-10.4 P-60ESect-10.4 P-59ESect-10.4 P-61ESect-10.4 P-62ESect-10.4 P-63ESect-10.4 P-64ESect-10.4 P-65ESect-10.4 P-66ESect-10.4 P-67ESect-10.4 P-68ESect-10.4 P-69ESect-10.4 P-70ESect-10.4 P-71ESect-10.4 P-72ESect-10.4 P-73ESect-10.4 P-74ESect-10.4 P-75ESect-10.4 P-76ESect-10.4 P-77ESect-10.4 P-78ESect-10.4 P-79ESect-10.4 P-80ESect-10.4 P-81ESect-10.4 P-82ESect-10.4 P-83ESect-10.4 P-84ESect-10.4 P-85ESect-10.4 P-86ESect-10.4 P-87ESect-10.4 P-88ESect-10.4 P-89ESect-10.4 P-90ESect-10.4 P-91ESect-10.4 P-92ESect-10.4 P-93ESect-10.4 P-94ESect-10.4 P-95ESect-10.4 P-98ESect-10.4 P-99ESect-10.4 P-100ESect-10.4 P-101ESect-10.4 P-102ESect-10.4 P-103ESect-10.4 P-104ESect-10.4 P-105ESect-10.4 P-106ESect-10.4 P-107ESect-10.4 P-108ESect-10.4 P-109ESect-10.4 P-110ESect-10.4 P-111ESect-10.4 P-112ESect-10.4 P-113ESect-10.4 P-114ESect-10.5 P-69ESect-10.5 P-1ESect-10.5 P-2ESect-10.5 P-3ESect-10.5 P-4ESect-10.5 P-5ESect-10.5 P-6ESect-10.5 P-7ESect-10.5 P-8ESect-10.5 P-9ESect-10.5 P-10ESect-10.5 P-11ESect-10.5 P-12ESect-10.5 P-13ESect-10.5 P-14ESect-10.5 P-15ESect-10.5 P-16ESect-10.5 P-17ESect-10.5 P-18ESect-10.5 P-19ESect-10.5 P-20ESect-10.5 P-21ESect-10.5 P-22ESect-10.5 P-23ESect-10.5 P-24ESect-10.5 P-25ESect-10.5 P-26ESect-10.5 P-27ESect-10.5 P-28ESect-10.5 P-29ESect-10.5 P-30ESect-10.5 P-31ESect-10.5 P-32ESect-10.5 P-33ESect-10.5 P-34ESect-10.5 P-35ESect-10.5 P-36ESect-10.5 P-37ESect-10.5 P-38ESect-10.5 P-39ESect-10.5 P-40ESect-10.5 P-41ESect-10.5 P-42ESect-10.5 P-43ESect-10.5 P-44ESect-10.5 P-45ESect-10.5 P-46ESect-10.5 P-47ESect-10.5 P-48ESect-10.5 P-49ESect-10.5 P-50ESect-10.5 P-51ESect-10.5 P-52ESect-10.5 P-53ESect-10.5 P-54ESect-10.5 P-55ESect-10.5 P-56ESect-10.5 P-57ESect-10.5 P-58ESect-10.5 P-59ESect-10.5 P-60ESect-10.5 P-61ESect-10.5 P-62ESect-10.5 P-63ESect-10.5 P-64ESect-10.5 P-65ESect-10.5 P-66ESect-10.5 P-67ESect-10.5 P-68ESect-10.5 P-70ESect-10.5 P-71ESect-10.5 P-72ESect-10.5 P-73ESect-10.5 P-74ESect-10.5 P-75ESect-10.5 P-76ESect-10.5 P-77ESect-10.5 P-78ESect-10.5 P-79ESect-10.5 P-80ESect-10.5 P-81ESect-10.5 P-82ESect-10.5 P-83ESect-10.5 P-84ESect-10.5 P-85ESect-10.6 P-1ESect-10.6 P-3ESect-10.6 P-2ESect-10.6 P-4ESect-10.6 P-5ESect-10.6 P-6ESect-10.6 P-7ESect-10.6 P-8ESect-10.6 P-9ESect-10.6 P-10ESect-10.6 P-11ESect-10.6 P-12ESect-10.6 P-13ESect-10.6 P-14ESect-10.6 P-15ESect-10.6 P-16ESect-10.6 P-17ESect-10.6 P-18ESect-10.6 P-19ESect-10.6 P-20ESect-10.6 P-21ESect-10.6 P-22ESect-10.6 P-23ESect-10.6 P-24ESect-10.6 P-25ESect-10.6 P-26ESect-10.6 P-27ESect-10.6 P-28ESect-10.6 P-29ESect-10.6 P-30ESect-10.6 P-31ESect-10.6 P-32ESect-10.6 P-33ESect-10.6 P-34ESect-10.6 P-35ESect-10.6 P-36ESect-10.6 P-37ESect-10.6 P-38ESect-10.6 P-39ESect-10.6 P-40ESect-10.6 P-41ESect-10.6 P-42ESect-10.6 P-43ESect-10.6 P-44ESect-10.6 P-45ESect-10.6 P-46ESect-10.6 P-47ESect-10.6 P-48ESect-10.6 P-49ESect-10.6 P-50ESect-10.6 P-51ESect-10.6 P-52ESect-10.6 P-53ESect-10.6 P-54ESect-10.6 P-55ESect-10.6 P-56ESect-10.6 P-57ESect-10.6 P-58ESect-10.6 P-59ESect-10.6 P-60ESect-10.6 P-61ESect-10.6 P-62ESect-10.6 P-63ESect-10.6 P-64ESect-10.6 P-65ESect-10.6 P-66ESect-10.6 P-67ESect-10.6 P-68ESect-10.6 P-69ESect-10.6 P-70ECh-10 P-1RECh-10 P-2RECh-10 P-3RECh-10 P-4RECh-10 P-5RECh-10 P-6RECh-10 P-7RECh-10 P-8RECh-10 P-9RECh-10 P-10RECh-10 P-11RECh-10 P-12RECh-10 P-13RECh-10 P-14RECh-10 P-15RECh-10 P-16RECh-10 P-17RECh-10 P-18RECh-10 P-19RECh-10 P-20RECh-10 P-21RECh-10 P-22RECh-10 P-23RECh-10 P-24RECh-10 P-25RECh-10 P-26RECh-10 P-27RECh-10 P-28RECh-10 P-29RECh-10 P-30RECh-10 P-31RECh-10 P-32RECh-10 P-33RECh-10 P-34RECh-10 P-35RECh-10 P-36RECh-10 P-37RECh-10 P-38RECh-10 P-39RECh-10 P-40RECh-10 P-41RECh-10 P-42RECh-10 P-43RECh-10 P-44RECh-10 P-45RECh-10 P-46RECh-10 P-47RECh-10 P-48RECh-10 P-49RECh-10 P-50RECh-10 P-51RECh-10 P-52RECh-10 P-53RECh-10 P-54RECh-10 P-55RECh-10 P-56RECh-10 P-57RECh-10 P-58RECh-10 P-59RECh-10 P-60RECh-10 P-61RECh-10 P-62RECh-10 P-63RECh-10 P-64RECh-10 P-65RECh-10 P-66RECh-10 P-67RECh-10 P-68RECh-10 P-69RECh-10 P-70RECh-10 P-71RECh-10 P-72RECh-10 P-73RECh-10 P-74RECh-10 P-75RECh-10 P-76RECh-10 P-77RECh-10 P-78RECh-10 P-79RECh-10 P-80RECh-10 P-81RECh-10 P-82RECh-10 P-83RECh-10 P-84RECh-10 P-85RECh-10 P-86RECh-10 P-87RECh-10 P-88RECh-10 P-89RECh-10 P-90RECh-10 P-91RECh-10 P-92RECh-10 P-93RECh-10 P-94RECh-10 P-95RECh-10 P-96RECh-10 P-97RECh-10 P-98RECh-10 P-99RECh-10 P-100RECh-10 P-101RECh-10 P-102RECh-10 P-107RECh-10 P-108RECh-10 P-103RECh-10 P-104RECh-10 P-105RECh-10 P-106RECh-10 P-109RECh-10 P-110RECh-10 P-111RECh-10 P-112RECh-10 P-113RECh-10 P-114RECh-10 P-115RECh-10 P-116RECh-10 P-117RECh-10 P-118RECh-10 P-119RECh-10 P-120RECh-10 P-121RECh-10 P-122RECh-10 P-123RECh-10 P-124RECh-10 P-1PSCh-10 P-2PSCh-10 P-3PSCh-10 P-4PSCh-10 P-5PSCh-10 P-6PSCh-10 P-7PSCh-10 P-8PSCh-10 P-9PSCh-10 P-10PSCh-10 P-11PSCh-10 P-12PSCh-10 P-13PSCh-10 P-14PSCh-10 P-15PSCh-10 P-16PSCh-10 P-17PS

Additional Math Solutions

Find more solutions based on key concepts

Show solutions add

Simplify the expressions in Exercises 97106. 41/147/2

Finite Mathematics and Applied Calculus (MindTap Course List)

Rewrite the expression without using the absolute-value symbol. 6. ||2| |3||

Single Variable Calculus: Early Transcendentals, Volume I

Find the area of the shaded region. 7.

Calculus: Early Transcendentals

Celsius and Fahrenheit Temperatures The relationship between Celsius (C) and Fahrenheit (F) temperatures is giv...

Applied Calculus for the Managerial, Life, and Social Sciences: A Brief Approach

State the Substitution Rule. In practice, how do you use it?

Single Variable Calculus: Early Transcendentals

Solve for y in terms of x: 2x3y=15

Elementary Technical Mathematics

Verifying Divergence In Exercises 714, verify that the infinite series diverges. n=1nn2+1

Calculus: Early Transcendental Functions (MindTap Course List)

The length of a = 4i – j – 2k is: 11 21

Study Guide for Stewart's Multivariable Calculus, 8th

For y = x3 ln x, y = a) x2(1 + 3 ln x) b) x3 + 3x2 (ln x) c) 3x d) 4x2(ln x)

Study Guide for Stewart's Single Variable Calculus: Early Transcendentals, 8th