University Physics with Modern Physics (14th Edition)

14th Edition

ISBN: 9780321973610

Author: Hugh D. Young, Roger A. Freedman

Publisher: PEARSON

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Chapter 30, Problem 30.48P

CALC Consider the circuit in Fig. 30.11 with both switches open. At t = 0 switch S₁, is closed while switch S₂ is left open. (a) Use Eq. (30.14) to derive an equation for the rate P_R at which electrical energy is being consumed in the resistor. In terms of ε, R, and L, at what value of t is P_R a maximum? What is that maximum value? (b) Use Eqs. (30.14) and (30.15) to derive an equation tor P_L, the rate at which energy is being stored in the inductor. (c) What is P_L at t = 0 and as t→∞? (d) In terms of ε, R, and L, at what value of t is P_L a maximum? What is that maximum value? (e) Obtain an expression for P_ε the rate at which the battery is supplying electrical energy to the circuit. In terms of ε, R, and L, at what value of t is P_ε a maximum? What is that maximum value?

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Chapter 30, Problem 30.47P

Chapter 30, Problem 30.49P

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Part C Find the height yi from which the rock was launched. Express your answer in meters to three significant figures. Learning Goal: To practice Problem-Solving Strategy 4.1 for projectile motion problems. A rock thrown with speed 12.0 m/s and launch angle 30.0 ∘ (above the horizontal) travels a horizontal distance of d = 19.0 m before hitting the ground. From what height was the rock thrown? Use the value g = 9.800 m/s2 for the free-fall acceleration. PROBLEM-SOLVING STRATEGY 4.1 Projectile motion problems MODEL: Is it reasonable to ignore air resistance? If so, use the projectile motion model. VISUALIZE: Establish a coordinate system with the x-axis horizontal and the y-axis vertical. Define symbols and identify what the problem is trying to find. For a launch at angle θ, the initial velocity components are vix=v0cosθ and viy=v0sinθ. SOLVE: The acceleration is known: ax=0 and ay=−g. Thus, the problem becomes one of…

Chapter 30 Solutions

University Physics with Modern Physics (14th Edition)

Ch. 30.1 - Consider the Tesla coil described in Example 30.1....Ch. 30.2 - Prob. 30.2TYU Ch. 30.3 - Prob. 30.3TYU Ch. 30.4 - Prob. 30.4TYU Ch. 30.5 - Prob. 30.5TYU Ch. 30.6 - An L-R-C series circuit includes a 2.0- resistor....Ch. 30 - In an electric trolley or bus system, the vehicles...Ch. 30 - From Eq. (30.5) 1 H = 1 Wb/A. and from Eqs. (30.4)...Ch. 30 - Prob. 30.3DQ Ch. 30 - Prob. 30.4DQ

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