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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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.