Part A A resting muscle cell has a 70 mV potential difference across the 7-nm-thick cell membrane, with the inside of the cell negative with respect to the outside. Ions such as Nat cross this potential difference through ion channels embedded in the membrane. The ions are not in vacuum--they If a Nat ion starts from rest outside the cell, what will its speed be when it reaches the inside of the cell if it travels in vacuum? This is an estimate, so give your answer to one significant figure. Express your answer to one significant figure and include the appropriate units. interact with the biomolecules of the cell--but suppose they were. HẢ v = Value Units Submit Request Answer

Part A A resting muscle cell has a 70 mV potential difference across the 7-nm-thick cell membrane, with the inside of the cell negative with respect to the outside. Ions such as Nat cross this potential difference through ion channels embedded in the membrane. The ions are not in vacuum--they If a Nat ion starts from rest outside the cell, what will its speed be when it reaches the inside of the cell if it travels in vacuum? This is an estimate, so give your answer to one significant figure. Express your answer to one significant figure and include the appropriate units. interact with the biomolecules of the cell--but suppose they were. HẢ v = Value Units Submit Request Answer

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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Part A Two electrons are in the vicinity of a proton. The potential energy of the proton is -2.40x10-25 J. What is the potential at the proton's position? Express your answer with the appropriate units. Vp = = -1.50x10-6 V Submit Previous Answers Part B Correct If one of the electrons is 1.0 cm from the proton, what is the distance of the second electron from the proton? Express your answer with the appropriate units. T2 1.06x10-3 m Submit Previous Answers VP 18.3.2 Correct Part C V = Two protons are held fixed on the x axis at x = +1 m and x = -1 m. A third proton is placed at the origin and then given a gentle nudge in the +y direction. Derive an expression for the speed of this proton as a function of its position on the y axis. Assume that it starts from rest and neglect gravity. Express your answer in terms of e, k, mp, and y. VE ΑΣΦ ?
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Find the potential difference between point a and point b for the situation shown below. Here &₁ = 12.0 V, E₂ = 8.27 V and R₁ = 3.732, R₂ = 5.642, and R3 = 2.48 2. Va - Vb R₂ www E2 V R3 R₁
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Item 29
= Due to a weak connection, there is a break in the circuit (shown below) between points a and b. If R₁ = 5.13, R₂ = 2.19 , and R3 = 28.0 V and 6.50 V respectively, find the potential difference Vab. Be sure to include the sign of the potential difference. Vab = Vb - Va V = E₁ R3 R₁ www www R₂ a E₂ 15.7, and the two batteries ₁ and 2 have voltages of
Electric Potential Energy (An lonic Crystal) 3. Four positive and four negative charges of equal magnitudes +Q are arranged alternately on the corners of a cube of side length d, +Q as drawn. This is a model of one cell of an ionic crystal such as -Q +Q salt, NaCl. a. Calculate the potential energy of this configuration. As d usual, take the energy to be zero infinitely far away from the charges. Express the energy in terms of k, Q, and d. d Hints: -Q +Q There are 12 pairs of opposite charges along the edges There are 12 pairs of like charges along the diagonals of each face There are 4 pairs of opposite charges along the cube's long diagonals b. In part (a), you should have determined that U < 0. Explain the relationship between this result and the observation that such crystals freely form in nature.
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