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The differential equation R+=0 describes the charges P coulombs at time t (in seconds), where C and R are the capacitance (in farads) and resistance (in ohms). respectively. (a) Solve the equation for P. given P = P₁ at t = 0. (b) Given the capacitance and resistance of a circuit to be 6.5 x 10 °F and 225 x 10³0. respectively. After 0.29 seconds the charge falls to 7 coulombs. Calculate the initial charge. Then, determine the charge after 1.5 seconds.

The differential equation R+=0 describes the charges P coulombs at time t (in seconds), where C and R are the capacitance (in farads) and resistance (in ohms). respectively. (a) Solve the equation for P. given P = P₁ at t = 0. (b) Given the capacitance and resistance of a circuit to be 6.5 x 10 °F and 225 x 10³0. respectively. After 0.29 seconds the charge falls to 7 coulombs. Calculate the initial charge. Then, determine the charge after 1.5 seconds.

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter11: Differential Equations
Section11.CR: Chapter 11 Review
Problem 33CR
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Question 1 The differential equation R+=0 describes the charges P coulombs at time t (in seconds), where C and R are the capacitance (in farads) and resistance (in ohms), respectively. (a) Solve the equation for P. given P = Po at t = 0. (b) Question 2 Find the general solution of the equation (x²-x-2)=x-3y(x-1) + 1. (a) Given the capacitance and resistance of a circuit to be 6.5 x 10-F and 225 x 10³0. respectively. After 0.29 seconds the charge falls to 7 coulombs. Calculate the initial charge. Then, determine the charge after 1.5 seconds. (b) The boundary conditions for the ODE in (a) is given as y = 5 at x = -1, find the particular solution of the equation in (a). Question 3 Given the following non-homogeneous second-order ordinary differential equation, y" - 2ky' + k²y = 12xekx, k>0 (a) Find a general solution of the ODE, provided that y = Px³ekx is part of the solution, where P is a constant. (b) Let y = 1, y'= 0 at x = 0, show that yekx (2x³-kx + 1)
Transcribed Image Text:Question 1 The differential equation R+=0 describes the charges P coulombs at time t (in seconds), where C and R are the capacitance (in farads) and resistance (in ohms), respectively. (a) Solve the equation for P. given P = Po at t = 0. (b) Question 2 Find the general solution of the equation (x²-x-2)=x-3y(x-1) + 1. (a) Given the capacitance and resistance of a circuit to be 6.5 x 10-F and 225 x 10³0. respectively. After 0.29 seconds the charge falls to 7 coulombs. Calculate the initial charge. Then, determine the charge after 1.5 seconds. (b) The boundary conditions for the ODE in (a) is given as y = 5 at x = -1, find the particular solution of the equation in (a). Question 3 Given the following non-homogeneous second-order ordinary differential equation, y" - 2ky' + k²y = 12xekx, k>0 (a) Find a general solution of the ODE, provided that y = Px³ekx is part of the solution, where P is a constant. (b) Let y = 1, y'= 0 at x = 0, show that yekx (2x³-kx + 1)
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