O The electric field across a cell membrane is 1.0 x 10' N/C directed into the cell. (a) If a pore opens, Which way do sodium ions (Na+) flow-into the cell or out of the cell? (b) What is-the magnitude of the electric force on the sodium ion? The charge on the sodium ion is +e,
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- Smashing Atoms Inside stars, energy is produced by nuclear fusion, where the nuclei of atoms smash together at high speeds. Inside our Sun, hydrogen is constantly being converted into helium in this way. In this problem, you'll investigate the particle speeds required for these reactions to occur. (a) Consider two protons, each with a charge equal to 1.602 × 10'9 C, a mass of 1.67 × 10~27 kg and a radius of 1 × 10 – 15 m. What is the minimum speed required for the two protons to collide (i.e. where their surfaces touch)? Assume the protons start infinitely far away from each other at the same speed and collide head-on. You can model the protons as spherical charges. (b) Start instead with two helium nuclei, each with a charge of 3.204 × 10–19 C, a mass of 6.64 × 10–27 kg, and a radius of 2 × 10-15 m. What is the minimum speed required for the two helium nuclei to collide? (c) You learned in thermodynamics that the average kinetic energy of a particle in a gas of temperature T is KE =…The cell membrane in a nerve cell has a thickness of 0.12 µm. Approximating the cell membrane as a parallel-plate capacitor with a surface charge density of 5.9 x 10-6C/m², find the electric field within the membrane.The practical limit to the strength of an electric field in the air is about 3.00 × 106 N/C . Above this strength, sparking takes place because air begins to ionize and charges flow, reducing the field strength. a) Calculate the distance, in meters, a free proton must travel in this field to reach 2.8 % of the speed of light, starting from rest.
- The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. Assumne that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.1x 10-6 C/m2.(a) What is the magnitude of the electric field within the cell membrane? (b) Find the magnitude of the electric force that would be exerted on a potassium ion (K*; charge = +e) placed inside the membrane. (a) Number Units (b) Number UnitsAsap plzConsider an object of mass 41.8 kg. Now imagine taking all the protons out of the object and stuffing them into a box. Also take all the electrons out of the object and stuff them in a second box. How much charge is contained in the box with all the protons? 8.00E+09 C 1.00E+09 C 2.00E+09 C 4.00E+09 C
- You are given three pith balls. When balls A and B are brought close together (far away from C), the two repel. When A and C are brought close together (far away from B), the two attract. When B and C are brought close together (far away from A), the two attract. Find four solutions for how A, B, and C could be charged (+, - or neutral) relative to one another.A helium nucleus, called an alpha particle, has a charge of 2e and mass of 4mp, where e and mp are the charge and mass of a proton, respectiyely. Starting from rest, a proton and an alpha particle are accelerated through a constant electric field E. After a time At, which particle has travelled the furthest distance? O (a) The alpha particle O (b) They travel the same distance O (c) The protonThe membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. Assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 6.8 × 10-6 C/m2. (a) What is the magnitude of the electric field within the cell membrane? (b) Find the magnitude of the electric force that would be exerted on a potassium ion (K+; charge = +e) placed inside the membrane.
- An negative point charge Q = - (1.000x10^0) µC is located at the origin. An electron is initially placed at at distance (2.8000x10^-1) m from Q. The initial velocity of the electron is zero. Under the electric force, the electron accelerates and moves to its final location, (9.40x10^-1) m from Q. What is the final kinetic energy of the electron? (assume there is no other forces on the electron) Give your answer in the unit of J with 3 s.f. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 AnswerPlease Help ASAP!!!!An electric field of magnitude 5.25 x 10° N/C points due east at a certain location. Find the magnitude and direction of the force on a-4.25 µC charge at this location. N |---Select-- v magnitude direction