Physics

Distributions of electric charges in a cell play a role in moving ions into and out of a cell. In this situation, the motion of the ion is affected by two forces: the electric force due to the non-uniform charge distribution in the cell membrane, and the resistive force (viscosity) due to colliding with the fluid molecules. In order to begin our analysis of this, let's consider a toy model in which the ion is moving in response to electric forces alone. Charges in a cell membrane are distributed along the opposite sides of the membrane approximately uniformly. This leads to an (on the average) constant electric field inside the membrane. A simple model that gives this kind of field is two large parallel plates close together. The field between the plates is approximately constant pointing from the negative to the parallel plate. This results in a charge feeling a constant force anywhere between the plates (sort of like flat-earth gravity turned sideways). Outside of the plates the electric fields from the two plates cancel and there is no force. 2. The electric field between the plates (inside the membrane) is about 107 N/C and the thickness of the membrane is about 7 nm. Estimate: 2.1 The electric force on the ion when it is in the center of the channel. F = N Explain your reasoning. 2.2 The acceleration of the ion when it is in the center of the channel. a = nm/s2 Explain your reasoning. 2.3 The magnitude of the change in the ion's potential energy as it crosses from one side of the plates to the other. U = J Explain your reasoning. 2.4 The kinetic energy the ion would gain as it crosses from one side of the plates to the other. KE = J Explain your reasoning. Could you explain 2.3!
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Which element is malleable and ductile
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which animal is prey to an owl in the food web pictured here? Answer is D: mouse explanation: not sure
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Examples of pure substances are elements and _________.A. MixturesB. Compounds
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I need help if you can help me to get 10 points.
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When a highenergy photon passes near a heavy nucleus, a process known as pair production can occur. As a result, an electron and a positron (the electron's antiparticle) are produced. In one such occurrence, a researcher notes that the electron and positron fly off in opposite directions after being produced, each traveling at speed 0.941c. The researcher records the time that it takes for the electron to travel from one position to another within the detector as 15.7 ns. How much time would it take for the electron to move between the same two positions as measured by an observer moving along with the positron?
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An astronaut is being tested in a centrifuge. The centrifuge has a radius of 11.0 m and, in starting, rotates according to = 0.260t2, where t is in seconds and is in radians. When t = 2.40 s, what are the magnitudes of the astronaut's (a) angular velocity, (b) linear velocity, (c) tangential acceleration, and (d) radial acceleration?
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A crate is being lifted into a truck. If it is moved with a 2470 N force and 4850 J of work is done, then how far is the crate being lifted?
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Mr. Dunn drives 64.8km from work at a speed of 48km/h. Mrs. Dunn drives 81.2km from workat a speed of 58km/h. They both leave work at the same time. Show complete working to securefull credits. [4]i. Who arrives home first?ii. How many minutes later is it before the second person gets home?iii. A Coyote is chasing its meal (the Road Runner). Unfortunately, the Coyote has difficultyadjusting to the Road Runners speed but we have a good idea of what it is.plz help me i will mark you as brainliest
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A 25kg box in released on a 27 incline and accelerates down the incline at 0.3 m/s2. Find the friction force impending its motion? What is the coefficient of kinetic friction?A block is given an initial speed of 3m/s up a 25 incline. Coefficient of friction
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A 3.6 kg block moving with a velocity of 4.3 m/s makes an elastic collision with a stationary block of mass 2.1 kg.(a) Use conservation of momentum and the fact that the relative speed of recession equals the relative speed of approach to find the velocity of each block after the collision. 1.1315 m/s (for the 3.6 kg block) 5.43 m/s (for the 2.1 kg block) (b) Check your answer by calculating the initial and final kinetic energies of each block. 33.282 J (initially for the 3.6 kg block) J (initially for the 2.1 kg block) J (finally for the 3.6 kg block) J (finally for the 2.1 kg block) Are the two total kinetic energies the same?
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who is better drake or juice world
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Which energy output objects work with the turbine?
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The graph shows the force and displacement of an object that is being pushed. How much work is done to push the object 0.12m?
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1. When an object moves it acquires(a) friction(b) traction(d) speed(c) energy of motion
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In witch water environment would holdfast be most useful
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ASAP pls answer Correctly and I will mark the brainliest
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The current in the wires of a circuit is 60 milliamps. If the resistance of the circuit were doubled (with no change in voltage), then its new current would be _____ milliamps
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How do catalysts and inhibitors affect reaction ratesPlease I'm in desperate help
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Why are cells important?
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Official (Closed) - Non SensitiveMEF Tutorial 2 Q3A train with a maximum speed of 29.17 m/s has anacceleration rate of 0.25 m/s2 and a decelerationrate of 0.7 m/s2. Determine the minimum runningtime, if it starts from rest at one station and stopsat the next station 7 km away.
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Assemble the electromagnetic spectrum by dragging each piece to the correct place on the wavelength scale.
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The corn plants in the image below have been grown with Lepidoptera sp. larvae, insects that feed on the corns cob and leaves. Select the statement that is correct, based on the image. A. A resistance gene was inserted into the plant on the right, but the corn is still vulnerable to Lepidoptera sp. larvae. B. A resistance gene was inserted into the plant on the right that makes the corn resistant to Lepidoptera sp. larvae. C. A resistance gene was inserted into the plant on the left that makes the corn vulnerable to Lepidoptera sp. larvae. D. A resistance gene was inserted into the plant on the right, but the corn cob is mutated.
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mix 4 L of 30C water is 6 L of 40C water and youll have water at what temperature?
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