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ONLY part a) and part d) of question 30.23 please!

ONLY part a) and part d) of question 30.23 please!

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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ONLY part a) and part d) of question 30.23 please!

30.23 Sodium ions (Na+) are flowing through a cylindrical ion channel which has a diameter of 0.85 µm and is 5 µm long. There is a potential difference of 225 mV between the ends of the chan- nel. The sodium ions have a drift velocity through the channel of 0.015 m s-¹ and in a period of 1 ms a total of 15 × 106 ions exit the channel. (a) What total charge exits the channel in a time period of 1 ms? (b) What is the current in the ion chan- nel? (c) What is the 'resistance' of the chan- nel to the flow of sodium ions? (d) What is the number density, n, of ions in the channel? (e) How many sodium ions are in the channel at any one time? 30.24 Given that the potential is +18 V at the point shown, what is the electrical po- tential at the points A, B, C, and D in the circuit shown in Figure 30.28? 3 Ω 2 Ω +18 V A + A 9 2 Ω ww B 2 Ω ww D ww 222 Figure 30.28 A circuit with 5 resistors and a single bat- tery.
Transcribed Image Text:30.23 Sodium ions (Na+) are flowing through a cylindrical ion channel which has a diameter of 0.85 µm and is 5 µm long. There is a potential difference of 225 mV between the ends of the chan- nel. The sodium ions have a drift velocity through the channel of 0.015 m s-¹ and in a period of 1 ms a total of 15 × 106 ions exit the channel. (a) What total charge exits the channel in a time period of 1 ms? (b) What is the current in the ion chan- nel? (c) What is the 'resistance' of the chan- nel to the flow of sodium ions? (d) What is the number density, n, of ions in the channel? (e) How many sodium ions are in the channel at any one time? 30.24 Given that the potential is +18 V at the point shown, what is the electrical po- tential at the points A, B, C, and D in the circuit shown in Figure 30.28? 3 Ω 2 Ω +18 V A + A 9 2 Ω ww B 2 Ω ww D ww 222 Figure 30.28 A circuit with 5 resistors and a single bat- tery.
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