Pearson eText Fundamentals of Differential Equations with Boundary Value Problems -- Instant Access (Pearson+)
7th Edition
ISBN: 9780137394524
Author: R. Nagle, Edward Saff
Publisher: PEARSON+
expand_more
expand_more
format_list_bulleted
Videos
Question
Chapter 7.RP, Problem 15RP
To determine
The inverse Laplace transform of the function
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Hi can anyone help me with getting point of Symmetry for Rayleigh equation limit cycles and stability. Thqnx you
Prove it pass to pass
proof heb (a+b)" - {("r) a". b-r
Chapter 7 Solutions
Pearson eText Fundamentals of Differential Equations with Boundary Value Problems -- Instant Access (Pearson+)
Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1 -12, Use Definition 1 to determine...
Ch. 7.2 - In Problems 112, use Definition 1 to determine the...Ch. 7.2 - In Problems 112, use Definition 1 to determine the...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - Prob. 14ECh. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 2128, determine whether f(t) is...Ch. 7.2 - Prob. 22ECh. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - Which of the following functions are of...Ch. 7.2 - For the transforms F(s) in Table 7.1, what can be...Ch. 7.2 - Thanks to Eulers formula page 166 and the...Ch. 7.2 - Prob. 32ECh. 7.2 - Prove that if f is piecewise continuous on [a,b]...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - Prob. 6ECh. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - Prob. 9ECh. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - Prob. 19ECh. 7.3 - Prob. 20ECh. 7.3 - Given that L{cosbt}(s)=s/(s2+b2), use the...Ch. 7.3 - Starting with the transform L{1}(s)=1/s, use...Ch. 7.3 - Use Theorem 4 on page 362 to show how entry 32...Ch. 7.3 - Show that L{eattn}(s)=n!/(sa)n+1 in two ways: a....Ch. 7.3 - Use formula (6) to help determine. a. L{tcosbt}....Ch. 7.3 - Prob. 26ECh. 7.3 - Prob. 27ECh. 7.3 - Prob. 28ECh. 7.3 - The transfer function of a linear system is...Ch. 7.3 - Prob. 30ECh. 7.3 - Prob. 31ECh. 7.3 - Prob. 32ECh. 7.3 - Prob. 33ECh. 7.3 - Prob. 34ECh. 7.3 - Prob. 35ECh. 7.3 - Prob. 36ECh. 7.3 - Initial value theorem. Apply the relation...Ch. 7.3 - Prob. 38ECh. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - Prob. 5ECh. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - Prob. 11ECh. 7.4 - Prob. 12ECh. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - Prob. 14ECh. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - Prob. 17ECh. 7.4 - Prob. 18ECh. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - Prob. 22ECh. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - Determine the Laplace transform of each of the...Ch. 7.4 - Prob. 32ECh. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Prob. 37ECh. 7.4 - Prob. 38ECh. 7.4 - Prob. 39ECh. 7.4 - Heavisides Expansion Formula. Let P(s) and Q(s) be...Ch. 7.4 - Prob. 41ECh. 7.4 - Prob. 42ECh. 7.4 - Prob. 43ECh. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 114, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 114, solve the given initial value...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2932, use the method of Laplace...Ch. 7.5 - In Problems 2932, use the method of Laplace...Ch. 7.5 - In Problems 29-32, use the method of Laplace...Ch. 7.5 - In Problems 29-32, use the method of Laplace...Ch. 7.5 - Prob. 33ECh. 7.5 - Use Theorem 6 in Section 7.3, page 364, to show...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - Determine the error e(t) for the automatic pilot...Ch. 7.5 - Prob. 40ECh. 7.5 - Prob. 41ECh. 7.6 - In Problems 14, sketch the graph of the given...Ch. 7.6 - Prob. 2ECh. 7.6 - In Problems 14, sketch the graph of the given...Ch. 7.6 - Prob. 4ECh. 7.6 - In Problems 510, express the given function using...Ch. 7.6 - In Problems 510, express the given function using...Ch. 7.6 - Prob. 7ECh. 7.6 - In Problems 5-10, express the given function using...Ch. 7.6 - Prob. 9ECh. 7.6 - Prob. 10ECh. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - Prob. 12ECh. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - Prob. 16ECh. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - The current I(t) in an RLC series circuit is...Ch. 7.6 - The current I(t) in an LC series circuit is...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 25-32, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 25-32, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 25-32, solve the given initial value...Ch. 7.6 - Prob. 35ECh. 7.7 - In Problems 1-4, determine L{f}, where f(t) is...Ch. 7.7 - Prob. 2ECh. 7.7 - Prob. 3ECh. 7.7 - In Problems 1-4, determine L{f}, where f(t) is...Ch. 7.7 - Prob. 5ECh. 7.7 - Prob. 6ECh. 7.7 - In Problems 5-8, determine L{f}, where the...Ch. 7.7 - Prob. 8ECh. 7.7 - Show that if L{g}(s)=[(s+)(1eTs)]1, where T0 is...Ch. 7.7 - Prob. 10ECh. 7.7 - Prob. 11ECh. 7.7 - Prob. 12ECh. 7.7 - Prob. 14ECh. 7.7 - Prob. 15ECh. 7.7 - Prob. 16ECh. 7.7 - In Problems 1518, find a Taylor series for f(t)...Ch. 7.7 - Prob. 18ECh. 7.7 - Prob. 19ECh. 7.7 - Use the recursive relation (7) and the fact that...Ch. 7.7 - Prob. 21ECh. 7.7 - Prob. 22ECh. 7.7 - Prob. 23ECh. 7.7 - Use the procedure discussed inProblem 23 to show...Ch. 7.7 - Find an expansion for ln[1+(1/s2)] in powers of...Ch. 7.7 - Prob. 26ECh. 7.7 - Prob. 27ECh. 7.8 - In Problems 14, use the convolution theorem to...Ch. 7.8 - Prob. 2ECh. 7.8 - Prob. 3ECh. 7.8 - Prob. 4ECh. 7.8 - Prob. 5ECh. 7.8 - Prob. 6ECh. 7.8 - Prob. 7ECh. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - Prob. 9ECh. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - Prob. 13ECh. 7.8 - Find the Laplace transform of f(t):=0tevsin(tv)dvCh. 7.8 - Prob. 15ECh. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - Prob. 17ECh. 7.8 - Prob. 18ECh. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - Prob. 22ECh. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - Prob. 24ECh. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - Prob. 29ECh. 7.8 - In Problems 29 and 30, the current I(t) in an RLC...Ch. 7.8 - Prob. 31ECh. 7.8 - Prob. 32ECh. 7.8 - Prob. 33ECh. 7.8 - Prob. 34ECh. 7.8 - Prob. 35ECh. 7.8 - Prob. 36ECh. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - Prob. 2ECh. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - Prob. 4ECh. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - Prob. 11ECh. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - Prob. 13ECh. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - Prob. 15ECh. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - Prob. 19ECh. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - In Problems 21-24, solve the given symbolic...Ch. 7.9 - Prob. 22ECh. 7.9 - In Problems 21-24, solve the given symbolic...Ch. 7.9 - Prob. 24ECh. 7.9 - Prob. 25ECh. 7.9 - Prob. 26ECh. 7.9 - Prob. 27ECh. 7.9 - Prob. 28ECh. 7.9 - Prob. 29ECh. 7.9 - Prob. 30ECh. 7.9 - A linear system is said to be stable if its...Ch. 7.9 - A linear system is said to be asymptotically...Ch. 7.9 - Prob. 33ECh. 7.9 - Prob. 34ECh. 7.9 - Figure 7.29 shows a beam of length 2 that is...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - Prob. 9ECh. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - Prob. 17ECh. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - Use the method of Laplace transforms to solve...Ch. 7.10 - Recompute the coupled mass-spring oscillator...Ch. 7.10 - In Problems 23 and 24, find a system of...Ch. 7.10 - In Problems 23 and 24, find a system of...Ch. 7.RP - In Problems 1 and 2, use the definition of the...Ch. 7.RP - In Problems 1 and 2, use the definition of the...Ch. 7.RP - Prob. 3RPCh. 7.RP - In Problems 3-10, determine the Laplace transform...Ch. 7.RP - In Problems 3-10, determine the Laplace transform...Ch. 7.RP - In Problems 3-10, determine the Laplace transform...Ch. 7.RP - Prob. 7RPCh. 7.RP - Prob. 8RPCh. 7.RP - Prob. 9RPCh. 7.RP - Prob. 10RPCh. 7.RP - Prob. 11RPCh. 7.RP - In Problems 11-17, determine the inverse Laplace...Ch. 7.RP - Prob. 13RPCh. 7.RP - Prob. 14RPCh. 7.RP - Prob. 15RPCh. 7.RP - Prob. 16RPCh. 7.RP - Prob. 17RPCh. 7.RP - Prob. 18RPCh. 7.RP - Prob. 19RPCh. 7.RP - In Problems 19-24, solve the given initial value...Ch. 7.RP - Prob. 21RPCh. 7.RP - Prob. 22RPCh. 7.RP - Prob. 23RPCh. 7.RP - Prob. 24RPCh. 7.RP - In Problems 25 and 26, find solutions to the given...Ch. 7.RP - In Problems 25 and 26, find solutions to the given...Ch. 7.RP - Prob. 27RPCh. 7.RP - Prob. 28RPCh. 7.RP - A linear system is governed by y5y+6y=g(t). Find...Ch. 7.RP - Prob. 30RPCh. 7.RP - Prob. 31RPCh. 7.RP - In Problems 31 and 32, use Laplace transforms to...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.Similar questions
- + Theorem: Let be a function from a topological space (X,T) on to a non-empty set y then is a quotient map iff vesy if f(B) is closed in X then & is >Y. ie Bclosed in bp closed in the quotient topology induced by f iff (B) is closed in x- التاريخ Acy الموضوع : Theorem:- IP & and I are topological space and fix sy is continuous او function and either open or closed then the topology Cony is the quatient topology p proof: Theorem: Lety have the quotient topology induced by map f of X onto y. The-x: then an arbirary map g:y 7 is continuous 7. iff gof: x > z is "g of continuous Continuous function farrow_forwardDirection: This is about Maritime course, Do a total of 6 (six) of this. Strictly write this only in bond paper. COMPLETE TOPIC AND INSTRUCTION IS ALREADY PROVIDED IN THE PICTURE. NOTE: strictly use nautical almanac. This is about maritime navigation.arrow_forwardProve itarrow_forward
- No chatgpt pls will upvotearrow_forwardDuring busy political seasons, many opinion polls are conducted. In apresidential race, how do you think the participants in polls are generally selected?Discuss any issues regarding simple random, stratified, systematic, cluster, andconvenience sampling in these polls. What about other types of polls, besides political?arrow_forwardNo chatgpt pls will upvotearrow_forward
- Which degenerate conic is formed when a double cone is sliced through the apex by a plane parallel to the slant edge of the cone?arrow_forwardFor the problem below, what are the possible solutions for x? Select all that apply. 2 x²+8x +11 = 0 x2+8x+16 = (x+4)² = 5 1116arrow_forwardFor the problem below, what are the possible solutions for x? Select all that apply. x² + 12x - 62 = 0 x² + 12x + 36 = 62 + 36 (x+6)² = 98arrow_forward
- Select the polynomials below that can be solved using Completing the Square as written. 6m² +12m 8 = 0 Oh²-22x 7 x²+4x-10= 0 x² + 11x 11x 4 = 0arrow_forwardProve that the usual toplogy is firast countble or hot and second countble. ①let cofinte toplogy onx show that Sivast countble or hot and second firast. 3) let (x,d) be matricspace show that is first and second countble. 6 Show that Indiscret toplogy is firstand Second op countble or not.arrow_forwardH.W For any events A and B, show that 1. P(AB)s P(A)≤ P(AUB)≤ P(A) + P(B)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Discrete Mathematics and Its Applications ( 8th I...MathISBN:9781259676512Author:Kenneth H RosenPublisher:McGraw-Hill Education
Mathematics for Elementary Teachers with Activiti...MathISBN:9780134392790Author:Beckmann, SybillaPublisher:PEARSON
Thinking Mathematically (7th Edition)MathISBN:9780134683713Author:Robert F. BlitzerPublisher:PEARSON
Discrete Mathematics With ApplicationsMathISBN:9781337694193Author:EPP, Susanna S.Publisher:Cengage Learning,
Pathways To Math Literacy (looseleaf)MathISBN:9781259985607Author:David Sobecki Professor, Brian A. MercerPublisher:McGraw-Hill Education
Discrete Mathematics and Its Applications ( 8th I...
Math
ISBN:9781259676512
Author:Kenneth H Rosen
Publisher:McGraw-Hill Education
Mathematics for Elementary Teachers with Activiti...
Math
ISBN:9780134392790
Author:Beckmann, Sybilla
Publisher:PEARSON
Thinking Mathematically (7th Edition)
Math
ISBN:9780134683713
Author:Robert F. Blitzer
Publisher:PEARSON
Discrete Mathematics With Applications
Math
ISBN:9781337694193
Author:EPP, Susanna S.
Publisher:Cengage Learning,
Pathways To Math Literacy (looseleaf)
Math
ISBN:9781259985607
Author:David Sobecki Professor, Brian A. Mercer
Publisher:McGraw-Hill Education
Intro to the Laplace Transform & Three Examples; Author: Dr. Trefor Bazett;https://www.youtube.com/watch?v=KqokoYr_h1A;License: Standard YouTube License, CC-BY