(II) Consider the circuit shown in Fig. 26–60, where all resistors have the same resistance R . At t = 0, with the capacitor C uncharged, the switch is closed. ( a ) At t = 0, the three currents can be determined by analyzing a simpler, but equivalent, circuit. Identify this simpler circuit and use it to find the values of I 1 , I 2 , and I 3 at t = 0. ( b ) At t = ∞, the currents can be determined by analyzing a simpler, equivalent circuit. Identify this simpler circuit and implement it in finding the values of I 1 , I 2 , and I 3 at t = ∞. ( c ) At t = ∞, what is the potential difference across the capacitor? FIGURE 26–60 Problem 49.
(II) Consider the circuit shown in Fig. 26–60, where all resistors have the same resistance R . At t = 0, with the capacitor C uncharged, the switch is closed. ( a ) At t = 0, the three currents can be determined by analyzing a simpler, but equivalent, circuit. Identify this simpler circuit and use it to find the values of I 1 , I 2 , and I 3 at t = 0. ( b ) At t = ∞, the currents can be determined by analyzing a simpler, equivalent circuit. Identify this simpler circuit and implement it in finding the values of I 1 , I 2 , and I 3 at t = ∞. ( c ) At t = ∞, what is the potential difference across the capacitor? FIGURE 26–60 Problem 49.
(II) Consider the circuit shown in Fig. 26–60, where all resistors have the same resistance R. At t = 0, with the capacitor C uncharged, the switch is closed. (a) At t = 0, the three currents can be determined by analyzing a simpler, but equivalent, circuit. Identify this simpler circuit and use it to find the values of I1, I2, and I3 at t = 0. (b) At t = ∞, the currents can be determined by analyzing a simpler, equivalent circuit. Identify this simpler circuit and implement it in finding the values of I1, I2, and I3 at t = ∞. (c) At t = ∞, what is the potential difference across the capacitor?
A bobsled starts at the top of a track as human runners sprint from rest and then jump into the sled. Assume they reach 40 km/h from rest after covering a distance of 50 m over flat ice. a. How much work do they do on themselves and the sled which they are pushing given the fact that there are two men of combined mass 185 kg and the sled with a mass of 200 kg? (If you haven't seen bobsledding, watch youtube to understand better what's going on.) b. After this start, the team races down the track and descends vertically by 200 m. At the finish line the sled crosses with a speed of 55 m/s. How much energy was lost to drag and friction along the way down after the men were in the sled?
For what type of force is it not possible to define a potential energy expression?
10. Imagine you have a system in which you have 54 grams of ice. You can melt this
ice and then vaporize it all at 0 C. The melting and vaporization are done reversibly
into a balloon held at a pressure of 0.250 bar. Here are some facts about water you
may wish to know. The density of liquid water at 0 C is 1 g/cm³. The density of ice at 0
C is 0.917 g/cm³. The enthalpy of vaporization of liquid water is 2.496 kJ/gram and the
enthalpy of fusion of solid water is 333.55 J/gram.
Chapter 26 Solutions
Physics for Scientists and Engineers with Modern Physics
Chemistry: An Introduction to General, Organic, and Biological Chemistry (13th Edition)
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