A 5.0-nm-diameter protein is in a 0.050 M KCIsolution at 25°C. The protein has 9 positive and 20negative charges. Model the protein as a spherewith a uniform surface charge density.Part AWhat is the electric potential of the protein at the surface?Express your answer with the appropriate units.Vsurface= 6.336Submit Previous Answers Request AnswerPart BμAX Incorrect; Try Again; 5 attempts remainingVV₂ m = 3.52What is the electric potential of the protein 2.0 nm from the surface?Express your answer with the appropriate units.μÅSubmitVBPrevious Answers Request AnswerX Incorrect; Try Again; 5 attempts remaining

Answered: Image /qna-images/answer/4b40defa-aea6-4c56-a890-fdec8a9637c1.jpg

A 5.0-nm-diameter protein is in a 0.050 M KCI solution at 25°C. The protein has 9 positive and 20 negative charges. Model the protein as a sphere with a uniform surface charge density. ▼ Part A What is the electric potential of the protein at the surface? Express your answer with the appropriate units. Vsurface = 6.336 Part B μÅ Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining V₂3.52 V Submit What is the electric potential of the protein 2.0 nm from the surface? Express your answer with the appropriate units. HÅ DING V ow Previous Answers Request Answer ? ? X Incorrect; Try Again; 5 attempts remaining

A 5.0-nm-diameter protein is in a 0.050 M KCI solution at 25°C. The protein has 9 positive and 20 negative charges. Model the protein as a sphere with a uniform surface charge density. ▼ Part A What is the electric potential of the protein at the surface? Express your answer with the appropriate units. Vsurface = 6.336 Part B μÅ Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining V₂3.52 V Submit What is the electric potential of the protein 2.0 nm from the surface? Express your answer with the appropriate units. HÅ DING V ow Previous Answers Request Answer ? ? X Incorrect; Try Again; 5 attempts remaining

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter26: Electric Potential

Section: Chapter Questions

Problem 38PQ

See similar textbooks

Similar questions

Two parallel conducting plates, each of cross-sectional area 400 cm2, are 2.0 cm apart and uncharged. If 1.01012 electrons are transferred from one plate to the other, (a) what is the potential difference between the plates? (b) What is the potential difference between the positive plate and a point 1.25 cm from it that is between the plates?
(a) Calculate the electric potential 0.250 cm from ail electron, (b) What is the electric potential difference between two points that are 0.250 cm and 0.750 cm from an electron? (c) How would the answers change if the electron were replaced with a proton?
In three regions of space, the electric potential is given by V(r)=0forrRV(r)=V04R2r2forRr2RV(r)=V0forr2R a. Plot V as a function of r. b. Find expressions for the electric field in all three regions. c. Plot E versus r in all three regions.
(a) Find the electric potential difference Ve required to stop an electron (called a stopping potential) moving with an initial speed of 2.85 107 m/s. (b) Would a proton traveling at the same speed require a greater or lesser magnitude of electric potential difference? Explain. (c) Find a symbolic expression for the ratio of the proton stopping potential and the electron stopping potential. Vp/Ve.
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) Imagine adding electrons to the pin until the negative charge has the very large value 1.00 mC. How many electrons are added for every 109 electrons already present?
Some cell walls in the human body have a layer of negative charge on the inside surface. Suppose that the surface charge densities are 0.50103C/m2 the cell wall is 5.0109m thick, and the cell wall material has a dielectric constant of = 5.4. (a) Find the magnitude of the electric field in the wall between two charge layers, (b) Find the potential difference between the inside and the outside of the cell. Which is at higher potential? (c) A typical cell in die human body has volume 1016m3 . Estimate the total electrical field energy stored in the wall of a cell of this size when assuming that the cell is spherical. (Hint: Calculate the volume of the cell wall.)
(a) Will the electric field strength between two parallel conducting plates exceed the breakdown strength for air ( 3.0 106 V/m) if the plates are separated by 2.00 mm and a potential difference of 5.0 103 V is applied? (b) How close together can the plates be with this applied voltage?
A charged particle is moved in a uniform electric field between two points, A and B, as depicted in Figure P26.65. Does the change in the electric potential or the change in the electric potential energy of the particle depend on the sign of the charged particle? Consider the movement of the particle from A to B, and vice versa, and determine the signs of the electric potential and the electric potential energy in each possible scenario.
A 5.00-nC charged particle is at point B in a uniform electric field with a magnitude of 625 N/C (Fig. P26.65). What is the change in electric potential experienced by the charge if it is moved from B to A along a. path 1 and b. path 2?
The charge density on a disk of radius R = 12.0 cm is given by = ar, with a = 1.40 C/m3 and r measured radially outward from the origin (Fig. P26.45). What is the electric potential at point A, a distance of 40.0 cm above the disk? Hint: You will need to integrate the nonuniform charge density to find the electric potential. You will find a table of integrals helpful for performing the integration.
Can a contour map help you visualize the electric potential energy? Explain.
(a) Find the potential at a distance of 1.00 cm from a proton. (b) What is the potential difference between two points that are 1.00 cm and 2.00 cm from a proton? (c) Repeat parts (a) and (b) for an electron.