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. F

    Electromagnetics - Parallel Plate Capacitor [so stuck ]

    I'm stuck. Here's the question, Q: The upper and lower conducting plates of a large parallel-plate capacitor are separated by a distance d and maintained at potentials V_0 and 0 , respectively. A dielectric slab of dielectric constant 6.0 and uniform thickness 0.8d is placed over the...
  2. F

    Can Plate Tectonics Be Linked to the Emergence of Life on Earth?

    Hey guys Im doing research for an assignment on plate tectonics and life. The question is basically how it works and also how it helps maintain Earth as a habitable enviroment. Now i am in no way looking just for answers, more an understanding so i can sound more intelligent in my project and...
  3. P

    The Parallel Plate Capacitor and Gauss Law

    Hi Can anyone please explain Gauss Law in simple terms for me? I really don't understand the electric flux and formulas in this law. My book is very short on explaining this law.
  4. P

    The Parallel Plate Capacitor and Gauss Law?

    The Parallel Plate Capacitor and Gauss Law? Hi I really do not understand these two things. I read like every single book on this things but still am a lot confused about these two concepts. Can anyone explain me in the most simplest terms of all? I would really appreciate that. What is this...
  5. B

    Can Metal Plate Connected to +ve Battery Terminal Get Charged?

    Hi, We know that when we connect the two parallel plates to a battery it will hold a +ve charge on the plate connected to positive terminal and -ve charge on the other plate. If we only connect one plate to the positive terminal, can it be charged? Isn't the positive terminal is at a...
  6. berkeman

    Help with Super-Resolution work on a license plate please

    I have several images of a California license plate (blue letters on white background) that were taken by a security camera here at my work. We need to contact the driver of the vehicle, so I am trying to apply some processing to the images to see if I can make out the license plate number...
  7. M

    Parallel plate capacitor capcitance question?

    I know that the capacitance is depended on area and distance etc etc. However, can someone explain to me the statement that as the area increases the, Elctrical field decreases. C would increase because of the area, and V would decrease because of the E, so for this scenario would the charge...
  8. S

    Parallel electric plate question

    1. If an alpha particle (q=+2e, m = 6.64*10^-27kg) is released from the positive plate (Vab=120V and the distance separating the plates is 12cm), with what velocity will it hit the negative plate? 2. An electron is fired from a negative plate toward a hole in a positive plate. It then...
  9. P

    Calculation involving Parallel Plate Capacitor

    Hi, I've a problem with this question and I'm not sure if I've worked it out correctly. This is the question: The membrane that surrounds a certain type of living cell has a surface area of 5.0 mm2 and a thickness of 10 nm. Assume that the membrane behaves like a parallel plate capacitor...
  10. A

    Charging a parallel plate capacitor

    Hi guys, I've been reading the forums and finally I have something to post :smile: I've got a question regarding charging parallel plate capacitors. Take this for example: Connect a 6 Volt power supply to a resistor of 2Mohm and in series with a 15uF capacitor initially uncharged, with...
  11. T

    Parallel Plate Capacitor and distance

    I'm going through my book and one of the Example exercises has the following problem: Two plates, each of area 3X10^-4 m^2 are used to construc a parallel-plate capacitor with capacitance 1 pF. (a) Find the necessary separation distance. Seems pretty obvious right? C = Eo(A/d) So, I...
  12. L

    Comparing an infinite grounded conducting plate to a system of point charges

    A point charge q is a distance d from a grounded conducting plate of infinite extent (figure a). For this configuration the potential V is zero, both at all points infinitely far from the particle in all directions and at all points on the conducting plate. Consider a set of coordinate axes with...
  13. P

    Parallel plate capacitor problem

    A capacitor is constructed from 2 square metal plates. A dielectric k= 4.93 fills the upper half of the capacitor and a dielectric k=10 fills the lower half of the capacitor. Neglect edge effects. The plate are separated by a distance of 0.37 mm and the length of the plates is 27 cm. Calculate...
  14. P

    Parallel plate capacitor electric charge

    Consider an air filled parallel plate capacitor with plate area A and gap width d. The plate charge is Q. The total energy stored in the capacitor is given by U= Q^2 *d /2 E_o A. With the battery connected, fill the gap by a slab with the dielectric constant k. Given : E= 70 V, k= 3.8, d=0.8 mm...
  15. J

    Steel ball dropped onto a plate

    A 5.60 kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 3.10 mm deep, what is the average force exerted by the plate on the ball during the impact? Ok so if you calculate out the speed of the ball you should get the ball is going 14 m/s when it...
  16. Reshma

    Magnetic field for parallel plate capacitors

    From Griffiths again! A large parallel plate capacitor with uniform surface charge \sigma on upper plate and -\sigma on lower is moving with a constant speed v. Q1]Find the magnetic field between the plates and also above and below them. My work: For a surface charge distribution: \vec K =...
  17. W

    E Field caused by infinite plate

    What is the equation for the electric field caused by an infinite plate of charge? Is it sigma/2epsilon0? So does that mean that the distance from a point to the plate doesn't matter in computing the E field? How does this change if a solid conducting slab with significant thickness (2 cm)...
  18. S

    Electric field & Parallel plate Capacitor

    Question When a nerve impulse propagates along a nerve cell, the electric field within the cell membrane changes from 7.0 x 10^5 N/C (pointing in one direction) to 3.0 x 10^5 N/C (pointing in the other direction). By approximating the cell membrane as a parallel-plate capicator, find the...
  19. S

    Thermal Expansion in an aluminum plate

    Question 1: A hole in an aluminum plate has a diameter or 1.178 cm at 23.00 degrees Celsius. (A) What is the diameter of the hole at 199.0 degrees Celsius? (B) What temperature is the diameter of the hole equal to 1.176 cm? For (A) I used the equation Change in Area = 2 * alpha * A *...
  20. A

    Solving the Wobble Rate for a Plate Thrown Off Axis

    Hey everyone, I need some help here. The question is to show that the wobble rate of a plate when thrown slightly off axis, is twice that of the spin rate. I don't even know how to start this problem. All I really know is that the inertia matrix can be written simply about body fixed axes. Thus...
  21. S

    Measuring Dielectric Constants of Materials in a Parallel Plate Capacitor

    I wanted to find the dielectric constant of different materials placed in a parallel plate capacitor using the equation: K = \frac{E_{dielectric}}{E_{original}} Where E = \frac{V}{d} I would use sensors connected to a computer to measure the voltage and i could easily measure the...
  22. M

    Finding the force exerted by one plate on another

    Hello everyone, I'm stuck on a mutliple choice question: A parallel-plate capacitor has a plate area of 0.3 m2 and a plate separation of 0.1 mm. If the charge on each plate has a magnitude of 5 10-6 C then the force exerted by one plate on the other has a magnitude of about: 1 E4 N 9 E5...
  23. S

    Why Do Charges Distribute Evenly on Conducting Plates and Spherical Conductors?

    why do the excess changes of a thin infinite conducting plates spread out evenly on the two faces? Is that just a way to minimize charge repulsion?
  24. H

    Using Quarter Wave Plate in Microscopy: Hanan's Question

    Hello everybody, I would like to put a quarter wave plate in my microscope (between two crossed polarizers). In every book i saw so far, the plate was just before the upper polarizer, and after the specimen. my question is - can i put the plate before the specimen? so the path will be...
  25. C

    Fea on single plate element-image attached

    I just modeled a single square plate of size 50x50 and thick 1 and applied a force on two nodes(total force is hence 100). The software i used is nastran. The force vector is shown as arrow in the image. My doubt is all the points in the plate should have the stress=100/area=100/(50*1)=2...
  26. S

    At Center of Convex Lens & Glass Plate: What is Observed?

    A convex lens is placed on a flat glass plate and illuminated from above with monochromatic red light. When viewed from above, concentric bans of red and dark are observed. What does one observe at the exact center of the lens where the lens and the glass plate are in direct contact.
  27. M

    How Does a Charged Ball in Equilibrium Calculate the Charge on Capacitor Plates?

    A small plastic ball of mass 6.70×10-3 kg and charge +.0150 uC is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.0200 m^2. What is the...
  28. G

    Will it be hard to find planets with live plate tectonics?

    Are live plate tectonics unique?
  29. M

    Determine the charge density on either plate (capacitor)

    Hello everyone... I'm suppose to determine the charge density on either plate. I attached a file which shows the diagram of what I'm talking about. I understand there is no field inside the conducting plate, and the only area penetrated by the field lines is the surface A' projtecting into...
  30. S

    Calculating Force Needed to Distort Steel Plate

    A steel plate of 10 cm square or (100 sq cm) is .25cm thick. How much force is need to distort its edges by 0.04 cm. sheer modulus for steel is 80 * 10^9 n/m^2, Plz Help Thanx
  31. W

    Calculating Oscillation Amplitude & Period of Deli Plate

    Hi I'm attempting this question and I'm wondering if this is the correct way of going about it or if I'm completely off track: For lunch you and your friends decide to stop at the nearest deli and have a sandwich made fresh for you with 0.300 kg of Italian ham. The slices of ham are weighed on...
  32. T

    Magnetic field generated by a metal plate

    How do I calculate the magnetic field genereated by a very long metal plate with width w and current i flowing along the direction of the largest dimension? If I calculate the intesity of the magnetic field in a point with distance b from the border of the metal plate, I get: B = \frac {\mu_0...
  33. E

    Calculate the charge on plate Capacitor

    this problem probably took me a whole hour :mad: but it seems like i don't know what I'm doing wrong... diagram: http://loncapa.elps.k12.mi.us/cgi-bin/plot.gif?file=MaMargaret_elps_1115513252_23407965_plot.data&output=png Capacitor MR=78.9 nF Capacitor PL=38.3 nF Capacitor TN=35.3 nF...
  34. C

    Stiffness Influence Coefficient Fea For Plate

    i have put this question in other forum also. I have understood the stiffness matrix generation for a single rectangular element as below. I consider each node having 2 translational dofs each in x and y coord system. There are 4 nodes in this rectangular plate element and hence 8 dofs...
  35. C

    Stiffness matrix fea plate element

    i know that the stiffness for a line element is calculated as fl/ae where a is known as area and l is the length,f is the force applied and e is the youngs modulus. How the stiffness of a plate element are calculated?
  36. C

    Plate top vonmises stress in fea

    I just used nastran to do an fea analysis using plate elements of thickness 1.22 mm. Nastran gives two vonmises stress values for plate elements 1.plate bottom von mises stress 2.plate top von mises stress what are they?
  37. T

    How do you compute the force to deform a flat plate?

    I am a trying to work out a design issue that you may be able to help with or maybe point me in the right direction. I am designing a 17-4 stainless steel plate to be used to support a trust bearing. The dimensions are 3.333 inches in diameter with a 1.20 inch center bore and .097 inches...
  38. X

    Electric Field and Energy of Parallel Plate Capacitor

    A parallel plate capictor with a plate area of 1.8 m^2 and a separation of 0.1 mm is charged to 200V. a. what is the electric field bwt. the plates? b. what is the energy/unit volume in the space between the plates? c. Find the capacitance C d. Calculate the total energy stored in this...
  39. C

    What is the Capacitance of a Multi Plate Capacitor?

    Hi, The problem is as follows: There's a multi plate capacitor, with plates of side L, equidistant from each other, but the plates get increasingly longer as a function of horizontal distance from the first plate, starting at height A, and finishing at height B. In other words, the...
  40. P

    Moment of inertiaFind the moment of inertia of the plate

    A uniform plate of height H=1.60 m is cut in the form of a parabolic section. The lower boundary of the plate is defined by: y=1.75x^2. The plate has a mass of 4.94 kg. Find the moment of inertia of the plate (in kgm^2) about the y-axis. I integrated 1.75x^2 to get .583x^3. Then put 1.60 in...
  41. R

    Thermal expansion of a metal plate

    Hi guys ,I am stuck up with the following problem,can you please give me a solution. When a metal plate with a circular hole at its centre, is heated, definitely along with the areal expansion of the plate the diametre of the circular hole also increases .But can you give...
  42. F

    Measuring Speed of Light with Glass Plate

    How can I determine the speed of light from a glass plate? I have the the numbers that I compared the average experimental value of the index of refraction with the general range of the index of refraction of glass.
  43. S

    Measuring Protein Concentration w/ Microtiter Plate: Lid On or Off?

    when i measure the protein concentration using a microtiter plate. should i have the plate covered with its lid when i put it in the microplate reader to measure the OD? thanks.
  44. W

    How Do You Calculate the Center of Mass of a Parabolic Plate?

    A uniform plate of height 1.59 m is cut in the form of a parabolic section. The lower boundary of the plate is defined by: y=0.65x^2. Find the distance from the rounded tip of the plate to the center of mass. i tried to do this usin calculus and got the answer Ycm=1.01 which was wrong and...
  45. S

    Calculating Potential of a Charged Plate: Figuring Out Fig. 23-1

    Quote: “We can see from our definition that the positive plate in Fig. 23-1 is at a higher potential than the negative plate..." I saw this statement in a book. May I know how to calculate the potential of a charged plate?
  46. maverick280857

    Simple Harmonic Motion of a Dielectric Slab in a Parallel Plate Capacitor

    Hello Here's a situation I would like to discuss... Suppose we have an ideal parallel plate capacitor which is filled with air (or vacuum) with permittivity = 1. Now if a dielectric slab of width equal to the space (d) between the plates is inserted into the space between the plates, it...
  47. W

    Calculating Work Done with a Series RC Circuit with Variable Plate Spacing

    hey everyone just joined! glad to be here! i just don't get one part of the question and once i get it, i should be able to get the rest. A battery with an emf of 20 volts is connected in series with a resistor of 300,0000 ohms and an air-filled parallel-plate capacitor of capacitance 6...
  48. J

    Struggling with Parallel Plate Capacitor Concepts?

    Hello Everybody, How are you? Could anyone please help me with this Parallel Plate Capacitor Problem, Here is the Question in detail Click on the link for a detailed explanation of the question: http://online.physics.uiuc.edu/cgi/courses/shell/phys112/summer04/tmau.pl?04/06 This is a...
  49. T

    Yield Strength of Metal Plate: Rolling, Heating, and Cooling

    Can someone help me explain how a plate of metal's yield strength changes as it is 1) Rolled (flattened) then 2) Heated for some hours and cooled, and then finally 3) Cooled and rolled additionally. Does the yield strength increase at first, then drop, and then increase again? That's what I...
  50. M

    Plate Deflection: Calculating Central & Eccentric Loads

    Deflection in "Plate" Hi, question is kind of based on another problem I'm trying to solve. I'm trying to find a max force from a falling object without knowing deflection or time, but that thread is in College Homework Help, because the problem to me resembles it. Anyways, my approach to...
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