According to Stefan's law of radiation the absolute temperature T of a body cooling in a medium at constant absolute temperature T, is given by dT = k(T - Tm), where k is a constant. Stefan's law can be used over a greater temperature range than Newton's law of cooling. (a) Solve the differential equation. (b) Show that when T- Tm is small in comparison to T, then Newton's law of cooling approximates Stefan's law. [Hint: Think binomial series of the right-hand side of the DE dT = k(T4 - T4) dt - (- -([ ))'- = KTm + ])-:)- Using the binomial series, we expand the right side of the previous equation. (Enter the first three terms of the expansion.) dT = kT dt m dT When T-Tm is small compared to the third term in the expansion vx can be ignored, giving - z k¸(T – Tm), where k, = 4kT 3. m
According to Stefan's law of radiation the absolute temperature T of a body cooling in a medium at constant absolute temperature T, is given by dT = k(T - Tm), where k is a constant. Stefan's law can be used over a greater temperature range than Newton's law of cooling. (a) Solve the differential equation. (b) Show that when T- Tm is small in comparison to T, then Newton's law of cooling approximates Stefan's law. [Hint: Think binomial series of the right-hand side of the DE dT = k(T4 - T4) dt - (- -([ ))'- = KTm + ])-:)- Using the binomial series, we expand the right side of the previous equation. (Enter the first three terms of the expansion.) dT = kT dt m dT When T-Tm is small compared to the third term in the expansion vx can be ignored, giving - z k¸(T – Tm), where k, = 4kT 3. m
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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