Plate Definition and 1000 Threads

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. R

    Energy in a charged metal plate

    Hi all, If i have a charged plate of charge Q coulumbs, then what is the energy contained in it? Is the energy independent of the way in which i managed to get a single plate of Q columbs charge? In the sense , suppose in the beginning there were two plates of charge +Q, -Q columbs...
  2. M

    Nominal stress for a plate with fillet radius with holes

    Homework Statement Can anyone help me with the equations i need to use to find the nominal stress of a right angled plate with thickness that has a fillet radius and two holes along the bottom half? Homework Equations The Attempt at a Solution
  3. F

    Calculating resistance between two bolts connected to a metal plate

    Homework Statement Given is a metal plate with two metal bolts attached to it, the attachement is assumed to be idealy conducting. A current I flows between the two bolts. Find a general formula for the Resistance between the two bolts (depending upon: a) the thickness of the plate (delta)...
  4. F

    Hydrodynamic cavitation via an orifice plate

    Hello all, I'm trying to induce hydrodynamic cavitation in a water filled vessel at STP using a high pressure piston pump and an orifice plate. Does anyone have any knowledge of estimation methods for the relationship between pressure drop, orifice area and cavitation intensity? Clearly the...
  5. T

    Calculating Charge Stored on Parallel Plates with Non-Conducting Water

    Homework Statement Two parallel plates, each of area 4.67 cm2, are separated by 3.93 mm with purified non-conducting water between them. A voltage of 5.39 V is applied between the plates. Find the charge stored on each plate. Answer in units of nC. Homework Equations C =...
  6. L

    How Does Membrane Thickness Affect the Electric Field in a Nerve Cell?

    The cell membrane in a nerve cell has a thickness of 0.12 micrometers. (a) Approximating the cell membrane as a parallel plate capacitor with a surface charge density of 5.9 x 10^(-6) C/m2, find the electric field within the membrane. (b) If the thickness of the membrane were doubled, would...
  7. K

    How Does a Parallel Plate Capacitor with Different Dielectrics Calculate Keq?

    A parallel plate capacitor is constructed such that there are two different dielectric materials in between the plates, each occupying half the space in between . Still this capacitor can be modeled as a simple parallel plate capacitor with same total area A, plate separation d, but with an...
  8. D

    How to Calculate Thin Plate Deflection for a Point Load at the Center?

    Hi. I have been doing some FEA modelling with solid works and am trying to calculate my deflection for a point load at the centre of a clamped periphery (not simply supported) circular thin plate. I need to calculate the theoretical values to make sure that my FEA is correct The formula I...
  9. N

    Conceptual Parallel Plate Capacitor

    Homework Statement Which statements are correct/incorrect for two oppositely charged, isolated parallel plates: (C=capacitance, U=stored energy, +Q and -Q = charge on the plates). Correct Incorrect When the distance is doubled, U is unchanged. Correct Incorrect Inserting a dielectric...
  10. H

    Calculating Stiffness of Aluminum Plate with Pressure Load

    Hi all: I am fresh to engineering and have basic question. I have a 100 inch length and 40 inch wide & 6 in depth plate , it has honeycomb structure what I mean 0.125 inch face sheet of aluminum on either side and rest (6-.125*2)is honeycomb made of alumnium.It is supportted on 4...
  11. J

    Parallel Plate Capacitor (work and potential difference)

    Homework Statement Professor Milly Coulomb finds it takes 3.0 J of work to drag, at constant speed, a -9.0 mC charge between the plates of a parallel plate capacitor. (a) What is the work done by the electrical force in taking the charge between the plates? (b) What is the potential...
  12. S

    Circuit with a parallel plate capacitor

    Homework Statement 1.) Consider a parallel plate capacitor with plates of area 1.36 m2 whose plates are 1.24 cm apart. The gap between the plates is filled with air (assume that κair is unity) and the positive plate has a charge of 10.5 nC on it while the negative plate has a negative charge...
  13. F

    Parallel Plate Capacitors Being Separated

    Homework Statement A parallel-plate air capacitor is made by using two plates 10 cm square, spaced 4.7 mm apart. It is connected to a 15 V battery. If the plates remain connected to the battery and the plates are pulled apart to a separation of 9.9 mm. What is the new capacitance? What is...
  14. F

    Parllel Plate Capacitors Connected Opposite

    Homework Statement Two capacitors are connected parallel to each other and connected to the battery with voltage 30 V. Let C1 = 9.8 micro F,C2 = 4.0 micro F be their capacitances. Suppose the charged capacitors are disconnected from the source and from each other, and then reconnected to each...
  15. H

    Current through parallel plate capacitor vibration sensor

    Homework Statement A parallel plate capacitor is used as a vibration sensor. The plates have an area of 100cm^2, the dieelectric is air, and the dist between the plates is given by d(t)=1+.01 sin(200 t) mm A constant voltage of 200 V is applied to the sensor. Determine the current...
  16. N

    Finding the electric field magnitude in a parallel plate compacitor.

    Problem: The drawing shows an electron entering the lower left side of a parallel plate capacitor and exiting at the upper right side. The initial speed of the electron is 9.42 x 10^6 m/s. The capacitor is 2.00 cm long, and its plates are separated by 0.150 cm. Assume that the electric field...
  17. S

    Parallel plate capacitor problem

    1.) Consider a parallel plate capacitor with plates of area 1.36 m2 whose plates are 1.24 cm apart. The gap between the plates is filled with air (assume that κair is unity) and the positive plate has a charge of 10.5 nC on it while the negative plate has a negative charge of equal magnitude on...
  18. CFDFEAGURU

    How to access WRC 151 for perforated plate deflections?

    Does anyone know of where I can get a copy of WRC (Welding Research Bulletin) 151? It pertains to perforated plates. Thanks
  19. C

    Deriving Velocity Field of Rotating Plate Using v = ω × r

    Homework Statement A thin, circular plate assumed to lie on the xy-plane is rotating about its center, located at (0, 0), with angular speed ω. (ω > 0 means that the plate is rotating in the counterclockwise direction.) Show that the velocity field of of this plate is given by v(x, y) =...
  20. A

    How Does Capacitance Change with Different Dielectrics in Series?

    If two dielectric materials with dielectric constants k1 and k2 and thickness d1 and d2 are within two copper plates, how do you obtain a capacitance given that the cross sectional areas are all the same?
  21. D

    Plate with hole, mechanics problem

    Hey, I'm trying to solve a little mechanics problem and I'm stuck. I want to find the maximum stress in the system. I know that it should be at the top and bottom of the hole. The plate is fully constrained at the left edge. I find the average tensile stress in section A: sigma =...
  22. G

    Question-Electrostatics-Point charge and uncharged plate

    Homework Statement A point charge is placed at a distance "d" from a huge uncharged metal (slab or plate).[Comment: I'm not sure. Work out both cases]. Calculate the force with which the charge attracts the plate. Homework Equations The Attempt at a Solution The field inside the...
  23. B

    How to Design an Orifice Plate for a Water Treatment Pilot Plant?

    Hello everybody Its Bashir .. I am doing a research on Upflow floating media filte and have some questions and kindly ask u to help me :I will explain to u what I am going to do exactly 1) I have to built a filter pilot plant for water treatment ( its my research ) This filter will...
  24. R

    Electric flux through a circular plate

    http://img508.imageshack.us/img508/7047/problemhi1.jpg Now I have gone about solving this problem by drawing a sphere with Q centred in it, let's call this sphere A1, now this circle defined by r=5 (lets call this circle C) cuts this sphere perfectly creating a spherical surface let's call...
  25. S

    Method of Images: Infinite, charged wire above a grounded plate

    Homework Statement Given an infinitely long wire, with charge density \lambda, parallel to and a distance d above an infinite, grounded, conducting sheet, what is the potential, V(x,y,z) above the sheet? What is the induced charge on the sheet? Homework Equations The Attempt at a...
  26. C

    [PhD Qualifier] Charged rod above metal plate

    Hey ... I'm trying to study for my PhD qualifying exam, and I have a bunch of questions from previous years, but no answer keys. Homework Statement A think uniformly charged rod of length L is positioned vertically above a large uncharged horizontal thick metal plate. The distance between...
  27. D

    Find the center of mass of a semi-circular plate

    Homework Statement Find the center of mass of a semi-circular plate of radius r Find the volume when the plate (above) is rotated around a line along its straight sideHomework Equations 2(pi) integral of r dr The Attempt at a Solution I honestly don't know how to do centroids. :-( I'd like...
  28. B

    Question About infinitely large charged plate

    In my MCAT review book there is a problem that is bugging me. If the distance between a point charge and an infinitely large charged plate is increased by a factor of 2, t he new force on the point charge will be? The answer is it will remain the same. Why is this? Isn't the force on a...
  29. Y

    Parallel Plate Capacitor True or False

    I keep getting the questions wrong. I'm so frustrated. I'd appreciate it if anyone can tell me what's wrong. Which statements are correct/incorrect for two oppositely charged, isolated parallel plates (Isolated means that the charge stays constant ): (C=capacitance, U=stored energy, +Q and...
  30. H

    Calculating Strain Energy of Circular Clamped Plate

    I need to calculate the strain energy of a symmetrical circular clamped plate using the equillibrium equation in polar coordinates.. Can somebody help me with the method??
  31. Y

    Plate Capacitors (Velocity selector)

    You have a plate capacitor which is grounded on the bottom and is held at a potential V which is then set to 0. You are given the length of the plates and the distances between them. A test charge is brought in with the charge and mass given along with its velocity. For a vanishing magnetic...
  32. S

    Parallel plate capacitor and dielectric

    Homework Statement a parallel-plate capacitor (2 plates) is filled with titanium dioxide which has a dielectric constant of 80. the area of each plate is 1 cm^2. a) what must be the spacing between the plates if one wishes to make a 10^-10 farad capacitor? b) if the dielectric strength...
  33. S

    How Do You Calculate the Capacitance of Two Charged Parallel Plates?

    Homework Statement two parallel plates have equal and opposite charges of 0.01 coulombs. the electric field between the plates is 10^5 Newtons/coulomb and the separation between the plates is 2mm. what is the capacitance of the plates? Homework Equations capacitance C = Q/V where Q is charge...
  34. A

    Capacitance of parallet plate with dielectric spheres in between

    I want to calculate the capacitance of a system consisting a parallel plate and dielectric spheres of different radius and dielectric strength in between the plates. please give some mathematical derivation. I really need to know it,my career depends on it. Please help me. :) thanks &...
  35. D

    Charge distributions vs. voltage on an infinite plate

    Don't know if this is the right place to post it, but oh well:smile: Homework Statement A one-sided conductor plate with negligible thickness and infinite dimension is charged to a voltage of V via electrostatic induction. Assuming charge is distributed evenly on the surface of the...
  36. S

    Weird Plate Capacitor: Calculating Capacitance

    Homework Statement I have a capacitor which i just like a plate capacitor, but instead of the upper electrode being a plate it is a point charge Q. the lower plate is held at a fixed potential V=0. I am supposed to calculate the capacitance of the capacitor. The Attempt at a...
  37. S

    How Is the Potential Difference Calculated in a Suspended Charge Scenario?

    A point charge of mass 0.0836 kg and charge q = +6.84 μC is suspended by a thread between the vertical parallel plates of a parallel-plate capacitor, as shown in the figure below. If the angle of deflection is θ = 22.3°, and the separation between the plates is d = 0.0221 m, what is the...
  38. R

    Distance-Varying Electric Field and Voltage of Parallel Plate Capacitors

    Homework Statement I encountered the following capacitor problem on a recent test and it has brought up a couple of questions about the voltage and electric field of parallel plates. In summary my questions are: 1) How is the electric field between parallel plates quantitatively related...
  39. N

    What is the electric field above a square loop carrying a uniform line charge?

    [SOLVED] Electric field of a plate Homework Statement Find the electric field a distance z above the center of a square loop (side s) carrying a uniform line charge λ (see Figure 1) - it's problem 2 on this page: http://teacher.pas.rochester.edu/PHY217/Homework/HomeworkSet3/HomeworkSet3.html...
  40. S

    Parallel plate capacitor find the volts

    A parallel-plate capacitor with only air between the plates is charged by connecting it to a battery. The capacitor is then disconnected from the battery, without any of the charge leaving the plates. A.) A voltmeter reads 50.0 V when placed across the capacitor. When a dielectric is...
  41. D

    Magnetic field for parallel plate capacitor

    Hello hello, What is the b-field for a parallel plate capacitor if the current J was found to be in the z-direction? I am told it will be in the z-direction as well. How so? Thanks so much!
  42. R

    More than one dielectric ibetween a parallel plate capacitor

    Hey, I am having some troubles with this question, the question asks me to calculate the capacitance of a parallel platecapacitor where the plates are separated by 3mm, and in between the are three layers of dielectric 1mm thick with different relative permitivities. Do I find the total by...
  43. M

    Help me - Force in x direction for a parallel plate electrode?

    Homework Statement I've two parallel plate as in attachment. The electrode area is A, when voltage are supply to the electrode, electrostatic force will be generated. Homework Equations Here, I would like to find the solution or equation of the generated force in x or y direction...
  44. E

    Electron in a parallel plate capacitor

    https://www.physicsforums.com/showthread.php?t=62593 I'm not quite sure how to obtain acceleration even after reading the suggestions. Help? Thank you.
  45. N

    Calculating Angular Acceleration of a Metal Plate

    Homework Statement A metal plate in the shape shown has a mass of 2.00kg and hangs from a pivot point located a distance d=0.300m from its center of mass. Its moment of inertia, I_cm, about an axis perpendicular to the plate and passing through the CM is 0.210kg*m2. Calculate the magnitude...
  46. V

    Work Done on a Parallel Plate Capacitor

    Homework Statement An isolated 5.60 microfarad parallel-plate capacitor has 4.90 mC of charge. An external force changes the distance between the electrodes until the capacitance is 2.00 microfarads.Homework Equations W = Fd c = Q/VThe Attempt at a Solution My first instinct was to solve to the...
  47. S

    Moment of Inertia of Plate Problem

    Homework Statement A uniform plate of height h= 0.69 m is cut in the form of a parabolic section. The lower boundary of the plate is defined by: y=1.10x^2. The plate has a mass of 5.62 kg. Find the moment of inertia of the plate about the y-axis. Homework Equations I=sum(m*r^2) OR I=...
  48. E

    Griffiths E&M: Need Help with Plate Distance?

    Homework Statement This question refers to Griffiths E and M book. I am confused about what the answer should be in terms of. Usually he gives us all constants that might be needed in the answer. But we need to know that distance between the plates here don't we? Homework Equations...
  49. tony873004

    Parallel plate capacitor and charge density

    Homework Statement A parallel plate capacitor with A=125 cm2 and d=1.25 mm is charged to a potential difference of 10.0 V. What is the charge density on each plate? Homework Equations V = \frac{{\sigma d}}{{\varepsilon _0 }}\,\,\,\, \Rightarrow \,\,\,\,V\varepsilon _0 = \sigma...
  50. J

    Deflect Steel Plates for Crane Outriggers

    I am placing a small crane on a concrete deck. The deck live load is 760psf. The crane is 17,260lbs. Each outrigger base plate contacting the deck has a surface area of .75 sq. ft. This gives a load of about 5753lb on each base plate. I am going to use steel plate (A36 plate) under the...
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