A potential difference of 102 mV exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
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A potential difference of 102 mV exists between the inner and outer surfaces of the membrane of a cell. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
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- Figure y (cm) ox 4 2 O 2 4 6 8 V = 30.0 V 10 12 (cm) V=20.0 V V = 10.0 V V = 0.00 V 1 of 1 > Part C What is the shortest distance one can move to undergo a change in potential of 9.50 V ? d = IVE ΑΣΦ 4 Submit Provide Feedback Request Answer ? mmA rod of length L is lying on x-axis with left end at the origin and has a non-uniformly linear charge density of . = 5x. 22. find the electric potential V at A(-4, 0) kdz d2 = adx Hint: dv= (-4,0) ++t 4 ++tl え AAnimal cells have a membrane that separates the interior of the cell from the outside environment. Typically, an electric potential difference exists between the inner and outer surfaces of the membrane. Consider one such cell where the magnitude of the potential difference is 44 mV, and the outer surface of the membrane is at a higher potential than the inner surface. A potassium ion (K+) is initially just inside the cell membrane (initially at rest). How much work (in J) is required for a cell to eject the ion, so that it moves from the interior of the cell to the exterior?
- For the system of four capacitors shown in the figure below, find the following. (Use C, = 3.00 uF, C, = 8.00 uF, C, = 1.00 UF, and C = 5.00 pF for the figure.) (a) the total energy stored in the system (b) the energy stored by each capacitor m) m3 m) m)A spherical conductor with a 0.493 m radius is initially uncharged. How many electrons should be removed from the sphere in order for it to have an electrical potential of 8.10 kV at the surface?There is a potential difference between the inner and outer surfaces of a cell membrane 7.5 nm thick. It takes +0.6 × 10−20 J of work for a biological pump to eject a positive singly-ionized sodium atom (Na+) from the interior of the cell. Neglecting any work the pump might have to do to overcome any non-electrostatic forces, what is the magnitude of the potential difference between the inner and outer surfaces of the cell?
- An isolated charged soap bubble of radius Ro = 4.65 cm is at a potential of V= 283.0 volts. If the bubble shrinks to a ridios that is 39.0% of the initial radius, by how much does its electrostatic potential energy U change? Assume that the charge on the bubble is spread evenly over the surface, and that the total charge on the bubble remains constant. AU = Upd- Unl = TOOLS x10A proton with an initial speed of 850,000 m/s is brought to rest by an electric field. ▾ Part A Did the proton move into a region of higher potential or lower potential? O Because the proton is a positive charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential. O Because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential. O Because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential. Because the proton is a positive charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential. Submit ✓ Correct Here we learn how to determine the distribution of the electric potential based on the movement of a charged particle. Part B Previous Answers What was the potential difference…How to solve this question
- Batteries and capacitors can be used to store electrical energy. Batteries do this in the form of chemical potential energy whereas capacitors do this with an electric field. Batteries tend to be more stable but capacitors tend to have faster charge and recharge times. A simple capacitor can be constructed from two conductive plates. Two conductive plates with an area of 10.0cm x 10.0 cm are held facing one another at a separation of 1.50 mm and 12.0 V is applied between them. a) Find the capacitance of this configuration b) Find the charge on the plates. c) How much energy is stored in the capacitor? d) How much energy can the capacitor store if a dielectric with K= 4.5 is inserted between the plates rather than air?Nerve cells in your body can be electrically stimulated; a large enough change in a membrane potential triggers a nerve impulse. Certain plants work the same way. A touch to mimosa pudica, the “sensitive plant,” causes the leaflets to fold inward and droop. We can trigger this response electrically as well. In one experiment, investigators placed electrodes on the thick tissue at the base of a leaf. The electrodes were 3.5 mm apart. When the electrodes were connected to a 47 μF capacitor charged to 1.5 V, this stimulated a response from the plant.a. Eventually, all the charge on the capacitor was transferred to the plant. How much charge was transferred?b. What was the approximate electric field between the electrodes?A conducting sphere of radius 5.0 cm is given a net amount of charge of 3.0 x109 C. Note: 109 C = 1 nC (1 nanocoulomb). What is the potential at a distance of 0.55 m from the center of the sphere? Assume that the electric potential at a very large distance from the sphere equals zero. V = V