A nerve signal is transmitted along the long, thin axon of a neuron in a small fish. The transmission occurs as sodium ions (Na+) transfer like tipping dominos across the axon membrane from outside to inside. Each short section of axon gets an excess of about 6.0 x 108 sodium ions/mm. Part A Determine the E field 4.0 cm from the axon produced by the excess sodium ions on the inside of the axon and an equal number of negative ions on the outside of a 1.0-mm length of axon. The ions are separated by the 8.0 x 10-9-m-thick axon membrane. Use x = 81 for the dielectric constant of water. Express your answer with the appropriate units.

A nerve signal is transmitted along the long, thin axon of a neuron in a small fish. The transmission occurs as sodium ions (Na+) transfer like tipping dominos across the axon membrane from outside to inside. Each short section of axon gets an excess of about 6.0 x 108 sodium ions/mm. Part A Determine the E field 4.0 cm from the axon produced by the excess sodium ions on the inside of the axon and an equal number of negative ions on the outside of a 1.0-mm length of axon. The ions are separated by the 8.0 x 10-9-m-thick axon membrane. Use x = 81 for the dielectric constant of water. Express your answer with the appropriate units.

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)...

See similar textbooks

Similar questions

Guiana dolphins are one of the few mammals able to detect electric fields. In a test of sensitivity, a dolphin was exposed to the variable electric field from a pair of charged electrodes. The magnitude of the electric field near the sensory organs was measured by detecting the potential difference between two measurement electrodes located 1.0 cm apart along the field lines. The dolphin could reliably detect a field that produced a potential difference of 0.50 mV between these two electrodes. What is the corresponding electric field strength?
A capacitor is composed of two metal plates. The two plates have the dimensions L = 0.11 m and W = 0.56 m. The plates have a distance between them of d = 0.1 m, and are parallel to each other. Part (a) The plates are connected to a battery and charged such that the first plate has a charge of q. Write an expression for the magnitude of the electric field, |E|, halfway between the plates. Part (b) Input an expression for the magnitude of the electric field, |E2|, just in front of plate two. Part (c) If plate two has a total charge of q = -1 mC, what is its charge density, σ, in C/m2?
А A condautoe having charge density 120 μc/m² is surrounded by a medium having dielectric constant 3. Find electric intensity at a point near the conductor.
I am working on physics homework and am stuck on this one! Help would be great, thank you!
Part A Near the surface of the Earth there is an electric field of about 150 V/m which points downward. Two identical balls with mass 0.467 kg are dropped from a height of 2.37 m, but one of the balls is positively charged with g = 412 µC , and the second is negatively charged with q2=-412 µC. Use conservation of energy to determine the difference in the speeds of the two balls when they hit the ground. (Neglect air resistance.) Express your answer using three significant figures. V AEO ? V4 -v_ = m/s Submit Request Answer
Two parallel plates of area 100 cm2 are given charges of equal magnitudes 0.000000445x 10-7 C but opposite signs. The eclectic field within the dielectric material filling the space between the plates is 1400000 V/m. Calculate the dialectic constant of the material *
n a single plane lies a stationary, positive point charge, qs, with two corresponding equipotential curves in the form of circles that both have a common center at the location of qs. The radial distance between the two equipotential circles is 4.0 cm. (See the diagram below.) What is the value for qs? Assume that k = 9.0 x 109 Nm2/C2. a. 3.3 x 10-10 C b. 4.4 x 10-10 C c. 2.0 x 10-12 C d. 4.4 x 10-9 C e. 3.3 x 10-11 C
Proton goes from rest and accelerates thru potential difference 500 V. Enters region of uniform vertical mag field. Once in mag field, proton transverses a semi-circle with diameter 10 cm before exiting. Speed of proton when in mag field? Strength of mag field? How much time does it spend in the mag field.
Q.4 (a) Draw and label a gold leaf electroscope. Explain how such an instrument can be used to distinguish between an insulator, a poor conductor and a good conductor (b) Describe and explain what happens when the terminals of a charged capacitor are connected by a piece of copper wire (c) Plates were fixed on the top and bottom of a cubical box with each side equal to 2 cm. A capacitor was constructed out of this box by filling it with a suitable dielectric material. In an experiment with this capacitor, the charge stored was measured and the electric field between the plates was determined as the charging potential difference was varied. The results are tabulated below. Charge stored/uC 7.5 30 60 75 90 Electric 0.5 2.0 4.0 5.0 6.0 field/Vcm-1 Plot a suitable graph which can be used to determine the dielectric strength, and hence the capacitance of the capacitor used in this experiment. Calculate the total energy stored by the capacitor when the electric field is 400 V/m.
B) Two voltage vectors Va and Vb combine to form a resultant vector Vr. Va = 110V Vb = 230 V Vb is at an angle of 45 degrees from the horizontal. Apply the cosine rule to determine the length of Vr and the angle between Va and Vr. Your Answer: Vr Va Vb
A proton travels through a region of space with no acceleration. Which one of the following statements is the best conclusion? O Both E and B must be zero in that region. O E must be zero, but B might be non-zero in that region. O E and B might both be non-zero, but they must be mutually perpendicular. O B must be zero, but E might be non-zero in that region. O E and B might both be non-zero, but they must point in opposite directions.
u.li)!ransactloh=LMS.EDU.StudêntEvaluation. TakeStudentEvaluation/1228666 Va 2d P + Q v. A particle of charge +q and mass m is ejected from the point P with the initial velocity = 40î + 30f(), traveling in a parabolic orbit with a maximum height d = 2cm in the uniform electric field and hitting the point Q at a distance of L 10cm. Since the distance between the plates is 2d and the potential difference is 1000V. find the ratio of the particle's charge to its mass (q/m). (Ignore the gravitational force). a) 16. 10-2 (C) edu tr/upload/ytu/CourseScan/2c8c1008-1e08-4748-b296-a55f1284f4e5.png mak için buraya yazın e 明 KI Cop