Changes in torus surface area The surface area of a torus with an inner radius r and an outer radius R > r is S = 4π2(R2– r2).
a. If r increases and R decreases, does S increase or decrease, or is it impossible to say?
b. If r increases and R increases, does S increase or decrease, or is it impossible to say?
c. Estimate the change in the surface area of the torus when r changes from r = 3.00 to r = 3.05 and R changes from R = 5.50 to R = 5.65.
d. Estimate the change in the surface area of the torus when r changes from r = 3.00 to r = 2.95 and R changes from R = 7.00 to R = 7.04.
e. Find the relationship between the changes in r and R that leaves the surface area (approximately) unchanged.
Want to see the full answer?
Check out a sample textbook solutionChapter 15 Solutions
CALCULUS:EARLY TRANSCENDENTALS-PACKAGE
Additional Math Textbook Solutions
Pre-Algebra Student Edition
Algebra and Trigonometry (6th Edition)
University Calculus: Early Transcendentals (4th Edition)
Elementary Statistics
A Problem Solving Approach To Mathematics For Elementary School Teachers (13th Edition)
College Algebra with Modeling & Visualization (5th Edition)
- Q2/ verify that grad (hgrad f- f grad h) 1 E = 11 h h₂ where and h are scalar factions.arrow_forward(b) Find the value of each of these sums. Στο 3 • 21 =0 (i) (ii) Σ=1 Σ=023 2arrow_forward(b) For each of the following sets, 6 is an element of that set. (i) {x ER|x is an integer greater than 1} (ii) {x ЄR|x is the cube of an integer} (iii) {6, {6}} (iv) {{6},{6, {6}}} (v) {{{2}}}arrow_forward
- Question 1 Reverse the order of integration to calculate .8 .2 A = = So² Son y1/3 cos² (x²) dx dy. Then the value of sin(A) is -0.952 0.894 0.914 0.811 0.154 -0.134 -0.583 O 0.686 1 ptsarrow_forward3 Calculate the integral approximations T and M6 for 2 x dx. Your answers must be accurate to 8 decimal places. T6= e to search M6- Submit answer Next item Answers Answer # m 0 T F4 F5 The Weather Channel UP DELL F6 F7 % 5 olo in 0 W E R T A S D F G ZX C F8 Score & 7 H FO F10 8 の K B N Marrow_forwardStart with a circle of radius r=9. Form the two shaded regions pictured below. Let f(6) be the area of the shaded region on the left which has an arc and two straight line sides. Let g(6) be the area of the shaded region on the right which is a right triangle. Note that the areas of these two regions will be functions of 6; r=9 is fixed in the problem. 0 f(0) (a) Find a formula for f(6)= | | (b)Find a formula for g(6)= lim ƒ (6) (c) 80 = lim g (0) (d) 80 = lim (e) [f(8)/g(6)]= 0 g(0)arrow_forward
- i need the solution of part d and bonus. THANK YOUarrow_forwardDraw the following solid and explain each step to obtain the final result of the volume (see image):arrow_forwardA cook has finished baking a cake and placed it on the bench to cool. The temperature in the room is 20°C and the temperature of the cake when it was taken out of the oven is 160°C (a) Given that the temperature of the cake is governed by Newton's law of cooling, write down a differential equation governing T(t), the temperature of the cake after t hours. What is the appropriate initial condition? (Newton's law of cooling: dT dt =-K(T-Ta), where K is a constant and Ta is the ambient temperature.) (b) From you answer in part (a), derive the solution T(t) = 20 + 140e Kt, where K is a (c) constant. Given that the cake has cooled to 90°C after 1 hour, determine the constant K. (d) The cook decides that the cake is cool enough to be taken out of the cake pan when its temperature lowers to 40 degrees C. Find when this will happen, both in exact form and as a decimal approximation to at least 2 decimal places, showing all working.arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageTrigonometry (MindTap Course List)TrigonometryISBN:9781337278461Author:Ron LarsonPublisher:Cengage LearningCollege Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
- Holt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL