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. K

    Boundary conditions of a bending plate

    Homework Statement I'm trying to find the boundary conditions for the following problem: A plate with length 2L is placed on supports at x = L/2 and x = - L/2. The plate is deforming elastically under its own weight (maximum displacement bowing up at x = 0). Both ends of the plate are free...
  2. M

    Kinematics question -- Impulse applied to a plate hanging from a wall

    Homework Statement A circular plate with radius 0.5 m and mas 5 kg is hung on the wall, fixed at a point that is 0.3 m above its center. The plate can freely rotate about the fixed point with no friction. A very short-duration impulse of 5Ns, along a direction that is tangential to the...
  3. M

    Determining speed of electron in a parallel plate capacitor

    Homework Statement A proton is released from rest at the positive plate of a parallel plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 50,000 m/s. What will be the final speed of an electron released from rest at the negative plate? Homework Equations...
  4. I

    Total energy of charge in parallel plate capacitor

    Homework Statement Find the total amount of energy of a charge (q) initially at rest placed at the left plate of a parallel plate capacitor. The left plate is at V = 0, the right plate at V = V0 and the plates are a distance L apart. Homework Equations Etot = 1/2 mv2 + qφ(x). φ(x) = Vx/L The...
  5. C

    Charge Distribution in a Parallel Plate Capacitor with Connected Plates

    Homework Statement Each plate in the figure has area a and separation d , end of battery is e find charge supplied by battery Homework EquationsThe Attempt at a Solution . each facing plate will have half the charge supplied by battery, but I am...
  6. maxelcat

    Field between two parallel postive plate different voltages

    Homework Statement This was a one mark question on an AS paper. [/B]Homework Equations [/B]The Attempt at a Solution Mark scheme says straight lines, equally spaced lines pointing down and starting/ending on the plates. (which I totally get if one plate was 0V or negative) However, if you...
  7. lonelypancreas

    Are ALL parallel plate capacitors linear?

    Homework Statement Are ALL parallel plate capacitors linear? Homework Equations D = permittivity * E The Attempt at a Solution Capacitance is linear if permittivity is constant. Is there a case where a parallel plate capacitor is not linear?
  8. W

    Find the max speed so that an electron doesn't hit the plate

    Homework Statement An electron is fired from x = 0 with an unknown V0 at 45 degs to the horizontal between two parallel plates separated by 2 cm. Electric field is 103 j N/C. Find: a) The max value of V0 so that the electrons don’t hit the upper plate 3.75 * 106 m/sHomework Equations If you...
  9. D

    Velocity of an Electron between Two Plate

    Homework Statement An electron enters a region between two large parallel plates made of aluminum separated by a distance of 2.0 cm and kept at a potential difference of 200 V. The electron enters through a small hole in the negative plate and moves toward the positive plate. At the time the...
  10. R

    Plate heat exchanger NTU method effectiveness

    Hi All I need to do an evaluation of a pilot plant heat exchanger that we have installed and see if it would be better suited than our current bigger installations. I was trying to calculate the effectiveness of the heat exchanger but I keep on getting 1 with the NTU method. Below is the...
  11. mertcan

    Inclined parallel plate capacitor

    hi, I wonder that inclined plate capacitor formula is the formula in last picture I shared? I am not sure because there are not enough examples about that ?
  12. J

    Dielectric inserted in parallel plate capacitor

    Homework Statement Homework EquationsThe Attempt at a Solution The force between the plates is given by (1/2)QE ,where Q is the charge on the plates and E is the electric field between the plates . Now Q = CV and E = V/d , where C is the capacitance , V is the potential difference and d is...
  13. D

    Electric field of a positive plate

    Homework Statement There is a large positively charged plate whose charge density is ##\sigma = 2.0 × 10^{-5}\frac{C}{m^2}##. What is the electric field at a point P, that is not enclosed between the plates. Homework Equations For an infinite sheet: $$\vec E = \frac{\sigma}{2\varepsilon_0}\hat...
  14. D

    Particle traveling towards a plate with an Electric Field

    Homework Statement From a distance of 10 cm, a proton is projected with a speed of ##v = 4.0 × 106 \frac{m}{s}## directly at a large, positively charged plate whose charge density is ##\sigma = 2.0 × 10^{-5} \frac{C}{m^2}##. (See below.) (a) Does the proton reach the plate? (b) If not, how far...
  15. Pushoam

    B-field inside a charging || plate (disc shaped) capacitor

    Homework Statement Homework EquationsThe Attempt at a Solution I have difficulty in solving part (C). The surface bounded by the Amperean loop is like an open drum. The current enclosed by the loop is ## I_{en}## = I through the bottom of the drum + I(s) through that part of the curved...
  16. Pushoam

    EMF across a loop with one end in a parallel plate capacitor

    Homework Statement Homework EquationsThe Attempt at a Solution Assuming the current is steady, I = JA, where J is the current density and A is the cross- sectional area ##E = J/\sigma## Can I take ##\sigma ## uniform here ?
  17. I

    Use of a half wave plate plus polarizer to attenuate lasers?

    The combination of a half-wave plate followed by a polarizer is commonly used as a variable attenuator for polarized lasers. The idea is that the beam enters the half-wave plate, and you rotate the half-wave plate leading to a rotation of the polarization direction of the beam. As the beam is...
  18. J

    A dinner plate, of mass 580 g is pushed .... find work/F

    Homework Statement A dinner plate, of mass 580 g is pushed 90.0cm along a dining room table by a constant force of F = 3.60 N directed at angle theta = 24.0 deg below the horizontal. If the coefficient of kinetic friction between the plate and the table's surface is 0.440 determine a. the...
  19. S

    Conservation of Work/Momentum of Puck Sliding Off Plate

    Homework Statement I saw this problem from a few years ago here on Physics Forum (https://www.physicsforums.com/threads/work-energy-theorem-problem.823990/) and wanted some clarification. Here is the problem: A curved plate of mass M is placed on the horizontal, frictionless plane as shown...
  20. G

    Electric field of a thick infinite non-conducting plate

    Homework Statement An infinite non-conducting plate of thickness ##d## lies in the ##xy## plane. The bottom surface of the plate lies in the plane ##z=0##. The charge density of the plate is ##\rho=\rho_0 z /d~,~\rho_0>0##. Find the electric field in the regions ##z<0~~,~~0<z<d~~,~~z>d## and...
  21. dovidu

    B Breaking a granite surface plate....

    ----------------Q 1--------------------- hello it's been two weeks to figure out how much force would it take to break a granite surface plate size of 1) 30x30x8 (cm) 2) 40x60x8 (cm) literally breaking it in half with a fulcrum underneath and two forces acting on the top i've posted a number...
  22. M

    Hit with mallet to one side clamped metal triangular plate

    Homework Statement I want to build a musical instrument for homework . I want to cut triangular metal plate where triangle will stand vertical to ground , bottom of triangle is 1 inch wide and clamped , triangle height is 42 inches. Does that triangle produce different notes when hitting from...
  23. Pushoam

    Energy of parallel plate capacitor

    Energy of a parallel plate capacitor with charge Q and potential difference V can be calculated in two ways: 1)Work done in bringing charge dq from infinty to the capacitor when there is potential V= q/C on the positive plate and V= 0 on the negative plate is dW = (q/C)dq integrrating from 0 to...
  24. CassieFordham

    Can Bipolar Plate Technology Create High Voltage Capacitors?

    I was reading about bipolar plate batteries, where the plates function as both the anode for one cell and cathode for the next cell, in series. It seems to me that the same idea should work to create a capacitor of higher voltage. If I had a dielectric material that had dielectric strength of...
  25. A

    Capacitance capacitor parallel plate with dielectric (Gauss)

    Homework Statement I have an elementary doubt with the calculation of the capacitance of a capacitor of parallel plates that has a dielectric in the middle. https://ibb.co/b0W4BQ Homework Equations ∫D⋅ds=Q D=E+γP C=Q/V The Attempt at a Solution Suppose the top plate has a positive charge...
  26. Spinnor

    Tracing a ray of light through a spiral phase plate

    Draw a single light ray through a spiral phase plate, anywhere but the middle of the plate, with the incoming ray being parallel to the axis of the spiral phase plate. On passing through the plate the ray is no longer parallel to the axis of the phase plate? Does the change in direction account...
  27. DevonZA

    Tensile stress in perforated steel plate

    Homework Statement Two lengths of steel plate 100mm wide and 15mm thick are riveted together by a single 18mm diameter rivet. If the joint carries a tensile load of 8kN calculate: a) The shear stress in the rivet b) The tensile stress in the perforated plate Homework Equations stress = force...
  28. K

    Understanding Compressive Stresses in a Plate with a Hole Under Uniaxial Loading

    Is t right that, in a plate with a hole, subjected to uniaxial loading, along one of the axis, one gets compressive stresses around the crack tip (in the same direction as that of the applied load ). I'm not able to understand this intuitively. Can someone help? I believe, intuitively, these...
  29. A

    Question on plate size in plate tectonics

    Question from an amateur: The Earth's plates seem pretty large compared to the planet. This example has about 20 to 30 with about 6 seemingly making up the majority of the Earth's surface. Is there a reason why they are so large? I'm writing a novel in which a planet, instead of having 20 to...
  30. Devarsh Patel

    Capacitance of parallel plate capacitor separated by

    How to find capacitance of parallel plate capacitor separated by conducting material with two different dielectric between Two parallel plate of Cu(5*6*0.1)mm and distance between them is (d=2mm) a thin Cu-plate of thickness 0.1 mm separates Mica layer & Quartz layer. how to find capacitance?
  31. C

    Phase shift of e.m. wave through a glass plate

    Homework Statement Consider a glass plate of refraction index n and thickness ## \Delta x ## placed between a point monochromatic source S and an observer O, as in picture. (a) Prove that, if absorption from the plate is neglegible, then the effect on the wave received by O is the add of a...
  32. J

    Calculating stress and deflection in steel plate

    Hiya, I'm been calculating stress and deflection in rectangle steel plate, I've been using two methods to see if I get the same results but i get different results. I want to confirm the methods I'm using and if I'm using them correctly. I have attached photos of my calculations, any...
  33. A

    Capacitance between point charge and finite plate

    I need help trying to set up this problem. I want to find the capacitance between a point charge and a finite plate (or disk) as the point moves from above the center of the plate to some distance off the plate. I have been able to simulate this problem using FEM, however, there should be a...
  34. H

    Kinetic energy of plate tectonics problem

    Homework Statement One effect of plate tectonics is that the North American continental plate moves across the Earth’s surface at a speed of about 1.15 cm/yr. The North American plate has an area of about 35 million square kilometers, an average thickness of about 25 km, and a density of about...
  35. kach22i

    Aerodynamic Forces on 6' x 3' plate at 45 degrees - 70 MPH?

    Thread for context this question came up in: http://ecomodder.com/forum/showthread.php/how-improve-fuel-economy-tonneau-cover-124-6.html#post535358 I'm guessing we will want the answer in pounds, perhaps FT/Pounds. Ballpark numbers on horizontal, vertical and or down-force and or lift. Just...
  36. Kmol6

    Parallel plate capacitor: Proton vs Electron

    Homework Statement A proton is released from rest at the positive plate of a parallel-plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 51000 m/s . What will be the final speed of an electron released from rest at the negative plate? Homework Equations...
  37. N

    Parallel plate capacitor voltage question

    Homework Statement A parallel-plate capacitor is connected to a 100 V battery until it is fully charged. The distance between the plates is d and the space between the plates is filled with air (k=1.0). Then, the battery is disconnected. If the distance between the plates is increased to 3d...
  38. J

    B Mass of a capacitor plate

    There's a force F between oppositely charged parallel plates. If the plates are free to move, they accelerate towards each other with acceleration a. If the plates are large and close to each other, we can reduce the mass of the system by moving the plates closer to each other, while keeping...
  39. jlmccart03

    Electric field strength near a metal plate

    Homework Statement A total charge of 21 μC is applied to a thin, 1μm square metal plate 72 cm on a side. Find the electric field strength near the plate's surface, far from the edges. Homework Equations I think E = kq/r^2, but I really don't know. The Attempt at a Solution I am...
  40. A

    Around how much do hot plate heat knobs increase per number?

    In my labs we use hot plates with a 0-10 temperature knob. The hot plates don't have a temperature monitor, so i have no idea how hot each number can increase it or how hot it is at the time. Sometimes i have labs where i have to heat something to more specific temperatures or else the reaction...
  41. Astronuc

    Update on Tectonic Plate Dynamics

    This caught my attention the other day, and I don't yet have time to review/explore the topic. A discovery about the movement of tectonic plates will have scientists rewriting (or update?) textbooks http://www.businessinsider.com/what-moves-tectonic-plates-2017-1 20 TW is pretty impressive...
  42. G

    What is the equilibrium temperature of a collector plate?

    Homework Statement You would like to put a solar hot water system on your roof, but you're not sure it's feasible. A reference book on solar energy shows that the ground-level solar intensity in your city is 750 W/m^2 for at least 5 hours a day throughout most of the year. Assuming that a...
  43. P

    Turbulent friction coefficient over a plate

    Homework Statement Homework Equations Cf=0.0577(μ/xρUm)0.2 The Attempt at a Solution I've managed to do parts a) and b), however I don't believe my attempt at the first part is correct as I am using a different Cf than the value used in the mark scheme. The expression I made for the first...
  44. W

    Reflective silencer plate: properties

    Uni mini projects: to design a reflective silencer plate: properties and calculations involved? as i am very new to this field and i need to design a simple piece of reflective silencer plate(perforation max 60%) is there any rule/equation that can help me to decide/calculate: the position...
  45. Z

    Method of images: infinite line of charge above plate

    Homework Statement An infinite line of charge with charge density λ is parallel to and a distance d above an infinite grounded conducting plate. What is the charge density σ that is induced in the plate? For simplicity, consider the line of charge to lie along the line x = 0. Homework...
  46. Robertphysics

    Parallel plate capacitor question

    HiI’ve been reading for a while and decided to ask , suppose we have a parallel plate capacitor with a distance x between the plates , in between the plates are another two plates with a dielectric so in total 4 plates. The outer two are attached to a dc supply of 12volts for example. Now I...
  47. PhanicKnight

    Diagram of electric potential difference in plate capacitor

    Homework Statement Plate capacitor is filled with two dielectrics of constants 3 and 4, and with a metal as seen in the picture. If the el. field in the first dielectric is 30 kV/cm, do: a) diagram of el. potential difference with calculated characteristic values using point C as a...
  48. DKKrunch

    Load (Weight) to bend A-514 Plate Steel?

    I am tying to find out how much weight I can support with a piece of plate steel (A514) that is supported only on the three edges. The open span would be 30" wide 36" long and .500" thick. I need to know what the maximum amount of weight I can support with .250" or less deflection. Can anyone...
  49. S

    Time-Varying Electric Field in Parallel Plate Capacitor

    Hi, A time-varying (sinusoidal) voltage source is applied to a parallel plate capacitor of length d. Then the E field will vary according to E(t) = V(t)/d. However, this suggests that, for any given time, the E field is constant with respect to spatial coordinates. Therefore, the curl of E is...
  50. hackhard

    Fully discharge a metal plate?

    is there any way to fully neutralize a charged metal plate ? connecting it to metal body of relatively huge capacitance will make its charge negligible but not zero? is there any other way?
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