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- The giant axon of a squid is 0.5 mm in diameter, 10 cm long, and not myelinated. Unmyelinated cell membranes behave as capacitors with 1 μF of capacitance per square centimeter of membrane area. When the axon is charged to the -70 mV resting potential, what is the energy stored in this capacitance?What is the potential at a distance of 0.0529 nm from a proton? 9.11 pC 13.6 V −27.2 V −13.6 V 27.2 VA gold nucleus has a radius of 7.3 * 10-15 m and a charge of +79e. Through what voltage must an alpha particle, with charge +2e, be accelerated so that it has just enough energy to reach a distance of 2.0 * 10-14 m from the surface of a gold nucleus?
- How much energy, in J, is stored in a 20 micro-Farad Capacitor connected to a 120 V voltage source?The spark of a natural lightning bolt is 25 gigawhats, it releases an energy of 21.8 x 10 e5 whatss x secHow many coulombs of discharge flow? La chispa de un relámpago natural es de 25 gigawhatss, libera una energía de 21.8 x 10 e5 whatss x seg¿cuantos coulombs de descarga fluyen?16.10b (b) Determine the maximum voltage that can be applied to a Teflon-filled parallel-plate capacitor having a plate area of 120 cm2 and insulation thickness of 0.0730 mm. kV
- Now you have a nucleus with 19 protons, placed at x = 5.1 Angstroms. What TWO values of x (along the x-axis) will the total electrostatic potential V be equal to zero? 0.28 Angstroms and -0.26 Angstroms -0.11 Angstroms and 0.08 Angstroms 0.11 Angstroms and -0.08 Angstroms -0.28 Angstroms and 0.26 AngstromsAssume that the leaf of part A (3.5cm width & 0.2mm thickness) has a length of40cm, and its top & bottom surfaces are shaped like flat plates. The fluid within the leafis mostly water. What is its capacitance?A) 8.85picoFB) 0.049 micro FC) 495600 FD) 80FA capacitor is constructed with a plate separation of 0.0003755m and the electric field between the two plates is measured to be 4768.6V/m.What is the capacitance (in F) if each plate collects Q=59.0uC?
- Question 1: The voltage across a membrane forming a cell wall is 84 mV and the membrane is 9.25 nm thick. What is the electric field strength in the cell wall, in volts per meter? Question 2: Suppose you want a capacitor bank with a total capacitance of 0.645 F and you possess numerous 1.5 mF capacitors. What is the smallest number you could connect together to achieve your goal? Question 3: In the Bohr model of a hydrogen atom, the electron travels in circular orbits around the proton. What is the electric potential, in volts, due to the proton in an orbit with radius 0.530 × 10–10 m?How much voltage must be used to accelerate a proton (radius 1.2×10−15m1.2×10−15m) so that it has sufficient energy to just "touch" a fluorine nucleus? A fluorine nucleus has a charge of +9e+9e and its radius is about 3.2×10−15 mm . Assume the potential is that for point charges.Fusion probability is greatly enhanced when appropriate nuclei are brought close together, but mutual Coulomb repulsion must be overcome. This can be done using the kinetic energy of high-temperature gas ions or by accelerating the nuclei toward one another. (a) Calculate the potential energy of two singly charged nuclei separated by1.00×10–12 m by finding the voltage of one at that distance and multiplying by the charge of the other. (b) At what temperature will atoms of a gas have an average kineticenergy equal to this needed electrical potential energy?