What is Plate: Definition and 1000 Discussions

As minor planet discoveries are confirmed, they are given a permanent number by the IAU's Minor Planet Center (MPC), and the discoverers can then submit names for them, following the IAU's naming conventions. The list below concerns those minor planets in the specified number-range that have received names, and explains the meanings of those names.
Official naming citations of newly named small Solar System bodies are approved and published in a bulletin by IAU's Working Group Small Body Nomenclature (WGSBN). Before May 2021, citations were published in MPC's Minor Planet Circulars for many decades. Recent citations can also be found on the JPL Small-Body Database (SBDB). Until his death in 2016, German astronomer Lutz D. Schmadel compiled these citations into the Dictionary of Minor Planet Names (DMP) and regularly updated the collection. Based on Paul Herget's The Names of the Minor Planets, Schmadel also researched the unclear origin of numerous asteroids, most of which had been named prior to World War II. This article incorporates public domain material from the United States Government document: "SBDB". New namings may only be added to this list below after official publication as the preannouncement of names is condemned by the WGSBN.

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  1. B

    Exploring the Effects of a Third Plate on Capacitance in a 3 Plate Capacitor

    Hi, I have a capacitor in which the first plate is connected to 3.3V and the second plate is connected to ground. A third plate which is connected to 2.5V is inserted in between the two plates. Will the capacitance between 3.3V and ground remains? If yes, will it be larger? Thank you...
  2. P

    Distribution of current in a conductive plate

    There's a circuit with voltage source V resistance R and current i. One section of the circuit has a conductive 'plate' element, connected like this: -----wire-------metal plate------wire----rest of circuit How does the current through the plate vary within the plate? I'm fairly...
  3. C

    Drag coefficient for plate perpendicular to airflow

    http://en.wikipedia.org/wiki/Drag_coefficient from wikipedia, it is written 1.98-2.05 for flat plate perpendicular to flow(2D) , but I have a differrent b/h ratio plate, where h=157mm and b=816mm , b/h=5.197 how to get the drag coefficient in this case? Thanks.
  4. D

    Magnetic Field of a Thin Conducting Plate

    A very, large, thin conducting plate lies in the x-y plane. The plate carries a current in the y direction. The current is uniformly distributed over the plate with σ amperes flowing across each meter of length perpendicular to the current. Use Ampere's Law to find the magnetic field at some...
  5. L

    Variance between two parallel plate capacitors

    I have performed the Millikan oil drop experiment, but after a acquiring data for 14 drops it was impossible to collect anymore data because the drops would keep moving out of view under the influence of an electric field. The thing is I made sure that everything was as level as possible and I...
  6. S

    Orifice plate effect on impeller flow rate

    Hi everyone, Hoping someone can point me in the right direction. I'm trying to find (a theoretical approximation of) the flow rate through a pipe where the pressure is provided by an axial flow impeller, but restricted by an orifice plate. I have (or can get hold of) all the physical...
  7. A

    Charge over an Insulating Plate

    Homework Statement Charge is distributed uniformly over the surface of a very large thin insulating plate to a density of 5.00 x 10–6 C/m2 . An insulating string connects a tiny charged bob to the vertical plate as shown in the diagram. If the mass of the object is .001 g and the string...
  8. B

    Electric field inside a parallel plate capacitor

    Ok I took E&M about 3 years ago and decided I needed to review it. I'm up to gauss' law and am getting confused about one thing. If you have two infinitely long oppositely charged plates, solving for the total e field inside is done by making two gaussian surfaces that enclose each plate. Doing...
  9. B

    Parallel plate capacitor with a dielectric?

    If you have a simple circuit with only a battery and a parallel plate capacitor with a dielectric, what exactly happens when the battery is turned on? Also, if the voltage of a capacitor with a dielectric is less than the EMF of the battery, what happens to the rest of the voltage? One...
  10. D

    Parallel plate capacitor's plate distance is doubled, does the energy double?

    Homework Statement A parallel-plate capacitor is charged by being connected to a battery and is then disconnected from the battery. The separation between the plates is then doubled. How does the electric field change? The potential difference? The total energy? Explain your reasoning...
  11. B

    How does a parallel plate capacitor work (conceptually)?

    Homework Statement How does a parallel plate capacitor work (conceptually)? Also how does each plate get charged? Homework Equations The Attempt at a Solution
  12. C

    Calculating Charge on a Parallel Plate Capacitor

    Homework Statement A 5800-nF parallel plate capacitor is connected to a 14-V battery and charged. What is the charge Q on the positive plate of the capacitor? Homework Equations C = Q/V The Attempt at a Solution This looks like a very simple question. The capacitor is fully charged...
  13. S

    Torque and Power required to turn a plate

    I have a question. I am working on a small project for class. We have locking Geneva mechanism that turns a table made of cast iron 72* in .5 seconds. The table mass is calculated to be 7300 kg (D=1.25m, h=.350m). Based on the 72* in .5 seconds, I calculated alpha to be 10.08 rad/s^2...
  14. R

    Triangular thick plate stiffness matrix transformation

    Hi community member, Regarding the book that I'm reading original writer has used Ni = ai + bi*x + ci*y shape function for the formulation of stiffness matrix for thick triangular plates. The writer has not mentioned in the article that the resulting stiffness matrix is required to be...
  15. K

    Paralell Plate Capacitors and Dielectric

    Homework Statement Two parallel plates, each having area A = 3118cm2 are connected to the terminals of a battery of voltage Vb = 6 V as shown. The plates are separated by a distance d = 0.35cm. You may assume (contrary to the drawing) that the separation between the plates is small compared...
  16. T

    How Do You Calculate Parameters of a Parallel-Plate Air Capacitor?

    A parallel-plate air capacitor is made by using two plates 16 cm square, spaced 3.7 mm apart. It is connected to a 12-V battery. What is the capacitance? What is the charge on each plate? What is the electric field between the plates? What is the energy stored in the capacitor? What I...
  17. L

    Parallel plate capacitor's charge

    http://img94.imageshack.us/img94/4392/ppcapqs2.png http://img267.imageshack.us/img267/5059/ppcapqs1.png In this question the charge is calculated by isolating Q in E=surface charge density/absalon not My question is, the electric field of an infinite charged plane is E=surface charge...
  18. S

    Parallel Plate Capacitor - Finding E field between plates

    Why is it that the field magnitude between two plates in a parallel plate capacitor is given by q/(εA)? In my book it is stated that one plate is of charge +q and the other -q. But if each plate is charged, wouldn't you need to account for the electric field produced by both places making...
  19. H

    Parallel plate capacitor,displacement current.

    Homework Statement Consider a parallel plate air filled capacitor with plate area 10cm2 seperated by a distance 2mm.The potential difference across the plate varies as V=360 sin(2π 106t) volts, where t is in seconds.Neglecting the fringe effects calculate the displacement current flowing...
  20. K

    Maximum initial speed the electron can have without hitting the negative plate

    Two parallel plates are 2.0 cm apart and the electric field strength between them is 1.0 × 10^4 N/C. An electron is launched at a 45 degree angle from the positive plate. What is the maximum initial speed v0 the electron can have without hitting the negative plate? i think the answer is...
  21. M

    E & M, E-potential and energy due to charged plate/ rod with infinite length

    Homework Statement An infinite sheet of charge that has a surface charge density of 25.9 nC/ m2 lies in the yz plane, passes through the origin, and is at a potential of 1.32 kV at the point y = 0, z = 0. A long wire having a linear charge density of 81.1 nC/ m lies parallel to the y-axis...
  22. C

    Steady State Temperature in Semi-Infinite Plate with Discontinuity

    Homework Statement This is problem 13.2.2 in Mathematical Methods in Physical Sciences by Mary Boa. Find the steady state temperature distribution using the Laplace Equation on a semi-infinite plate extending in the y direction with the following boundary conditions: On the lines y =...
  23. S

    Problem in meshing a plate (thermal problem)

    Hello, I’m trying to solve the following problem: a composite plate with circular steel in the lower left corner. The upper and lower surfaces are insulated, on the right the temperature is constant, and on the left exits natural convection. The analysis is steady-state. I’m using a...
  24. Z

    Torques on a rectangular plate

    Consider the system on the attached picture showing a rectangular plate attached to a pole by two screws - one in A and one in B. Now to figure out the condition for equilibrium one would calculate the torques around point A and B to find that one screw must be pulling and the other one pushing...
  25. R

    Plate bending program (Help to spot the problem)

    hi all, I've created the small program which deals with the calculation of plate bending with quadrilateral finite element, program is written with Fortran. I've included all the source files that need to compile the program ,I've even added the executable file (along with input file...
  26. J

    MATLAB Simulating Metal Plate Heat Variation with Matlab

    I have to simulate in Matlab the variation of temperature in a metal plate/block, heated at just one end. One suggestion I received is that I have to use partial differential equations and the energy balance law but I don't know how to start. I study computer science, so physics is a bit off to...
  27. A

    The total force on a charge plate

    Three boards are in the x axis. the middle one is in x=0 and charged in a positive sign density is: σ. the other 2 boards are in : x=d and x=-2d. This 2 boards are grounded. The area of the boards is A (A>>d). I found that on the middle plate the charge is divided in 2:1 ratio: The electric...
  28. J

    Finding the thickness of a plate with a slot, after finding K (SCF)

    Homework Statement Hi all, I was wondering if anyone can help with this? A uniform Steel strut (material Modulus of Elasticity 210 GN/m2, Poisson’s Ratio 0.3) of length 400mm and width 80 mm is restrained as appropriate at one end and under an axial tensile load of 20 KN applied to the...
  29. R

    Stiffness matrix of bending plate

    hi, I'm studying the book for elasticity theory and I stuck at one of the equation in that book, the stiffness matrix for elements(thin or thick plate) in bending is given in that form ke= t∫∫BT*Db*B*det(J)dζdη+∫∫BT*Ds*B*det(J)dζdη B is the strain matrix(5x12) where the inner...
  30. B

    Stress calculations on a disk plate

    Hello, I am trying to determine the calculation to use to determine the force at which a disk plate will fail for the following set up. The disk is slid onto a metal bung for a roll, the disk is supported from the inside diameter for around 50mm. A force is then applied on the oppsite side...
  31. O

    How Is Work Calculated for a Driver Plate During Stress Accumulation?

    Show that the work done by the driver plate during a stress accumulation phase is W=\frac{2m2g2fd}{k}(fs-fdI'm not sure where to start with this. I am given several equations but can't reach the desired equation. Fn=ρghA m=ρA3/2 θ=\frac{fs}{fd} X=\frac{xG}{2fsρghA1/2}...
  32. M

    Local strain energy density for a plate subjected to in-plane linear load

    Dear all, I would like to know from you the solution about this problem (which is not a homework, but a topic of my Master thesis!): I need the strain energy density related to a circle of radius r0 centered in an arbitrary point of a square plate, under the boundary conditions described in...
  33. D

    Wind Turbine DIY Project for School - Steel Plate vs Non Magnetic Plate

    i don't know if i am in right part of forum. i want to build some sort of wind turbine for a school project. all the diy project are 6 or 9 coils with 8 or 12 magnets. the coils are on non magnetic board and the magnets on steel plate. why on steel, the steel plate increase the total...
  34. E

    Power of a hot plate and actual heat power delivered

    Hey Guys, I really did my best to locate the best sub-forum for my question (I was hesitating between the Homework one and this one), so please bear with me if my choice is wrong ... Now to my question: So in my kitchen, I have a hot plate appliance, and it says on it that power...
  35. V

    Standard Harmonic Motion of a Plate

    A child with poor table manners is sliding his 240 dinner plate back and forth in SHM with an amplitude of 0.120 on a horizontal surface. At a point a distance 7.00×10−2 away from equilibrium, the speed of the plate is 0.370 . (a) What is the period (b)What is the displacement when the speed...
  36. F

    Evaluating the capacity of steel plate

    Hello All. I'm trying to evaluate a design based on first principles. I have 2 trusses made from RHS (simple A frame) between which I wish to tech-screw a sheet of 2.9 mm galvanised sheet. Loading will primarily be from material (i.e. soil to a max depth of 400 mm) being placed on the...
  37. K

    Energy needed to pull parallel plate capacitor

    Homework Statement a parallel plate capacitor of 10pF is charged to 10kV ( air dielectric). It is then isolated from battery.The plates are pulled away from each other until distance is 10 times more than before. what is the energy needed to pull the plates. Homework Equations c=εA/d ...
  38. U

    Simple maximum/minimum application (temperature in a circular plate)

    Homework Statement I have a circular plate made of some metal and it is shaped like the equation x^2 + y^2 \leqslant 1 The temperature at any given point in this plate is given by the function T(x,y) = x^2 -x+2y^2 I'm supposed to find the hottest and the coldest points. Homework...
  39. R

    Is the C=εA/d Formula for a Parallel Plate Capacitor an Approximation?

    Just wondering if the formula C=εA/d is a realistic formula for a parallel plate capacitor, surely its making an approximation about the plates being HUGE or that at the edges the electric field doesn't go in nice straight lines from one plate to the other? If it is an approximation does...
  40. B

    Charged ball hanging in equilibrium between two parallel plate capacitors.

    1. An experiment is run to determine the validity of numerous electrostatic principles. A small ball of mass 6.50 x 10-3 kg with a charge of ±1.50 μC is suspended from a non-conductive wire and hangs between two parallel plate capacitors. An angle of 30.0° is measured between the wire and the...
  41. T

    Nonisothermal Parallel Plate Flow Problem

    Homework Statement The problem wants us to develop an equation for velocity distribution and the mass flow rate of a fluid, flowing between 2 parallel plates: The distance between the two plates is a. The top plate is maintained at constant T1; the bottom plate is maintained at...
  42. P

    Plate Tectonics: The Asthenosphere and Lithosphere

    The Asthenosphere and Lithosphere We can all agree that the Earth is rotating on its axis, making one rotation about every twenty-four hours. We can also agree that the Earth is revolving around the sun in its happy 364-day elliptical orbit. Correct? But why? We have proof to support these...
  43. C

    Fresnel zone plate diffraction

    Homework Statement A zone plate is to be set up on an optical bench, where it will be used as an enlarging lens. Its innermost zone is to be 0.2250 mm in diameter and monochromatic blue-green light of wavelength 480 nm from a cadmium arc is to be used. If the magnitude of the enlargements is...
  44. E

    Dual plate capacitor with two dielectric slabs

    Homework Statement Dual plate capacitor with two dielectric slabs placed between the capacitors and a battery supply's a voltage across the capacitors. The slabs are not equal in dielectric permeability. What is the charge at the interface of the two slabs? Homework Equations The...
  45. O

    Microtiter/Microwell plate filling with solid materiale - HOW?

    Hi :) Well this is my first post here in the forum, I hope I put it into the right category. Im hoping that someone here might be able to help me with a little problem that I can't find the solution to. I am not a lab geek, unfortunately but I am trying to describe a process where I found...
  46. V

    What happen when a plate of charged capacitor is earthed?

    Homework Statement A capacitor is charged with some potential difference. A charge will developed on both of it's plates. Now remove this capacitor from battery and ground/earth one of the plate through a wire. What will happen?? Homework Equations gauss law The Attempt at a Solution...
  47. S

    Sliding off from the circular plate

    Homework Statement Toby is on a merry-go-round. The coefficient of static friction between his feet and the merry-go-round is 0.5. Toby is located 2 m from the center. a. Once Toby starts to slide he is going to slide outward until he falls off the merry-go-round at radius = 3m. How...
  48. P

    2 parallel plate conducts and dielectric-pic included

    I uploaded the problem statement and the answer in the solution manual. I think the manual is wrong for Q2 which should've been (200V)kC2 not 200VkC1, right?
  49. K

    X and y coordinates, integration, semicircular plate (masteringphysics)

    Homework Statement Use equations x_{cm}=\frac{1}{M}\int x dm and y_{cm}=\frac{1}{M}\int y dm to calculate the x- and y-coordinates of the center of mass of a semicircular metal plate with uniform density \rho and thickness t. Let the radius of the plate be R. The mass of the plate is thus...
  50. jegues

    Dieletric Boundary Conditions (Parallel Plate Capacitor)

    Homework Statement See figure attached for problem statement, as well the solution. Homework Equations The Attempt at a Solution I'm confused as to how he is writing these equations from the boundary conditions. What I understand as the boundary condition for D is, \hat{n}...
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