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. jacksonpeeble

    Parallel Plate Capacitor Spacing Question

    If the length and width of each plate of a parallel plate capacitor were doubled, and the spacing between the plates was also doubled, by what factor does the capacitance change? I know that increasing the length and width of a plate increases its capacitance, and I thought that it was...
  2. M

    2 dielectrics in a parrelle plate capacitor. (i dont need answer just the intuition)

    question: so here is what my problem is. there are two dielectrics between a parallel plate capacitor. distance between the two plates is '2s' and each dielectric is 's' long. each plate has a charge of \itshape \sigma (top being pos. and bottom being neg. and doesn't give an area) how would i...
  3. S

    Bolt dimensions In plate bending

    Hey I have this plate, and as you can see it has 4 bolt connections and no other. When applying the load bending will occur in the plate. I am interested in making the diameter of bolt as small as possible. My problem is though that I only can see the shear forces in the plate. How can I...
  4. F

    Surface charge density and more, for a parallel plate cap.

    Homework Statement An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 1.60 mm. 1. If a 25.0 V potential difference is applied to these plates, calculate the electric field between the plates. 2. What is the surface charge density...
  5. E

    How to Calculate the Force Applied on a Plate by Another Plate?

    Hello all, I was looking to determine the force applied on a plate A by another plate B which is pushing down on plate A to hold it. what are all the information required to calculate the force and how? (see attached pic) Thanks
  6. Z

    Plate Capacitor: Find Voltage with 4\muC & 0.4m2 Area

    Homework Statement The plates of a capacitor have an area of 0.4m2 and are separated by a distance of 0.5 micrometers. The material between the two plates is air with a dielectric constant of 1.0 One plate of the capacitor is given the charge of 4\muC. The voltage across the capacitor is, in...
  7. B

    Capacitance of a parallel plate capacitor with 2 dielectrics

    Homework Statement Find the capacitance of the parallel plate capacitor with 2 dielectrics below. Given that the parallel plate capacitor has area A = WL and the separation between plates is d. The Attempt at a Solution My method is to use integration. First solve for two small...
  8. P

    Charged particle movement close to single charged plate

    Hi everybody. I am a mechanical engineer trying to do an electrical experiment. I wonder if anybody can help me with an advice. Here is my experiment. I have a single rectangular metal plate to which I apply a known high negative voltage DC. Not sure yet what that voltage is going to be...
  9. P

    Proton in a plate capacitor: how far does it go?

    1. Homework Statement A proton traveling at a speed of 7.22 *106m/s enter the gap between the plates of a 7.86 cm wide parallel plate capacitor. The surface charge densities on the plate are ± 4.98 *10-6 C/m2. How far (in m) has the proton deflected sideways when it reaches the far edge of...
  10. K

    Electric field near metal plate

    Homework Statement An infinite, thin, uniformly charged rod (line charge density lambda) is placed parallel to a metal plate a distance d above it. Calculate the E-field close to the surface of the plate as a function of perpendicular distance to the rod. Homework Equations The...
  11. M

    Find tension in angled cables holding steel plate

    Homework Statement I found that the steel plate weighs 23.1 kN from using the volume and density of steel. The length of L1=3.2m, L2= 3.9m. The angle on the left, theta, equals 94.4 degrees and alpha equals 54.9 degrees. I am just confused on how to find the tension in the cables. If someone...
  12. G

    Parallel Plate Capacitor: Electric field strength, flux & magnetic field

    Homework Statement This is a question on a past paper of a second-year undergraduate physics paper. A parallel plate capacitor is charged and the voltage increases at a rate of dV/dt. The plate radius is R and the distance between the plates is d. (a) What is the electric field...
  13. Z

    Temperature distribution on a circular plate

    Hi, I have a maths exam tommorrow (!) and I'm stuck on something: Its about solving LaPlace's equation in plane polar coordinates. There is a circular plate witha temp dist that satisfies (1/r)(d/dr(r.df/dr)) + 1/r2 . d2/dp2 = 0 (p is phi) so I used a separable eq of the form f=RP...
  14. G

    Reaction Forces of a simply supported thin plate

    I have a square thin plate 620mm*620mm that is simply supported on all four edges and is subjected to a uniformly distributed patch load (q0) over a central area of 58mm*58mm. I have calculated the central deflection to be (3.137x〖10〗^(-6) q0 (mm) via navier solution and the max stress in the...
  15. M

    Simple Parallel Plate Capacitor Question

    Assuming a Parallel Plate Capacitor of area A, separation distance d, plate charges \pm Q: and plate charge densities \pm\sigma: In my textbook and in Wikipedia, Electric Field of a charged plane with large or infinite area: \frac{\sigma}{\epsilon} Electric Field between plates of...
  16. H

    Projectile motion of plate fall

    projectile motion (URGENT!) Homework Statement A busy waitress slides a plate of apples along a counter to a hungry customer sitting near the end of the counter. The customer is not paying attention, and the plate falls to the ground horizontally at .84m/s. The counter is 1.34m high...
  17. M

    Work Done by Increasing Plate Distance of Flat Capacitor

    Homework Statement Flat capacitor with a plates distanced d = 2 cm and the area A= 1 dm² are connected to a voltage U = 100 V. We disconnect the source of voltage and we increase the distance between the plates to twice the distance. How much work is done? Homework Equations C= ε*A/ d...
  18. C

    Can you gold plate a penny using gold nitrate?

    Just like the experiment in high school using zinc powder and sodium hydroxide, is there a way to use real gold plating without having to melt real gold. Such as gold nitrate? Is gold nitrate rare, expensive or dangerous? Thanks!
  19. G

    Flat plate in tension test

    I was wondering what equiptment would be best suited to using multiple strian gauges on specific points on a flat steel plate with a central hole in tension. What is the simplest experimental set-up to obtain reading from the gauges? Any points/links would be appreciated.
  20. K

    True/False: Plate Size & Fracture Stress

    True or false: a large plate of a brittle material fractures at a higher applied tensile stress as compared to a small plate of the same material. and True or false: the critical stress for a fracture of an internal crack of length 1mm is less than the critical stress for fracture of the same...
  21. R

    Parllel Plate Capcitor separation distance and voltage

    Hello, I'm studying for an exam tomorrow and am facing a question I can't for the life of me fathom. " A PP air capacitor is made by using to plates 16 cm squared, spaced 4.7 mm apart, connected to a 12V battery" Find Capacitance, charge on each plate, electric field between plated...
  22. S

    Applying a Bending Moment to a Plate with Forces

    I'm using FEA to simulate an in plane bending moment on a plate. The moment is 200Nm, and the plate is 80mm tall. Do I simulate the forces on the edge in situation (a) or situation (b)? It's a seemingly simple question, but people have put doubt in my head, I hoped a fresh mind might...
  23. jacksonpeeble

    Momentum Broken Plate Problem

    Momentum "Broken Plate" Problem Homework Statement By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 3.10 m/s and v2 = 1.95 m/s. As the plate falls, its momentum has only a vertical component, and no component parallel to...
  24. A

    Parallel plate capacitor with dielectric in a gravitational field.

    Homework Statement A square parallel plate capacitor with vertical plates of area A and distance d, charged with a constant charge Q and is completely filled with a dielectric material the same dimension as the gap between the plates, with dielectric constant k and mass m. Assuming the...
  25. N

    Electron cloud from uv pulse aimed at negative plate of a capacitor

    Homework Statement A very short pulse UV laser is used to liberate a number of electrons from the negative plate in the arrangement in (i) above. The electrons drift towards the positive plate under the influence of the electric field over a time scale much longer than the laser pulse...
  26. M

    Damping due to porous plate travelling through hydraulic oil

    Evening All, I am looking at a problem where there is essentially a hydraulic cylinder containing a double acting type rod (with an annulus). There will be some holes in the annulus, which will allow fluid to pass through once there is a load on the end of the rod causing it to extend. The...
  27. M

    Trying to make a parallel plate capacitor

    Hi evry1 I am trying to make a parallel plate capacitor , which am using to make a capacitive proximity sensor. Question 1 I thought of making 2 plexiglass plates of dimension ( 90 X 50 X2.5 mm). An aluminium mesh is sandwiched between them. Now a positive voltage is supplied to...
  28. A

    Forces acting on a particle placed on a plate

    wHAT are the forces acting on a particle placed on a plate which is moving with an acceleration??
  29. B

    Finding Center of Mass - Plate with hole

    Homework Statement https://wug-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/DuPage/phys2111/fall/homework/Ch-09-Momentum/plate_with_hole/3.gif A uniform circular plate of radius 11 cm has a circular hole of radius 3 cm cut out of it. The center of the plate is at the origin...
  30. K

    Uniform rectangular plate equilibrium problem

    Homework Statement A uniform rectangular plate of width d, height h, and weight W is supported with its top and bottom edges horizontal. At the lower left corner there is a inge, and the upper right corner there is a cable. For what angle \theta with the vertical will the tension in the cable...
  31. J

    Calculate the center of mass on the force plate

    Homework Statement The attached jpeg shows a force plate with four measured masses each corresponding to a corner node. Calculate the center of mass on the force plate. Homework Equations I think they would be: xcg = (x1M1 + x2M2 + x2M3 + x4M4) / (M1 + M2 + M3 + M4) The ycg...
  32. K

    Modal Analysis of Plate using lines and beam elements

    ANSYS Help: Simple Modal Analysis of Plate I am modeling a plate (36"x3"x.25") in ANSYS. When I construct a line out of two keypoints and give the line a rectangular section, the analysis works and I can output modal displacements just fine. With these modal displacements I can plot the mode...
  33. E

    Capacitance after changing plate distances

    1. Homework Statement , from my crappy textbook 2. Homework Equations barely explained in my crappy textbook Q=CV C=\epsilon A/d 3. The Attempt at a Solution that should be easy but the textbook is crap Before squeezing: Simplify the circuit by combining the two capacitors in...
  34. M

    Electric field 0.1mm above charged plate.

    Homework Statement A thin 0.08x0.08 meter copper plate is charged with 9*10^9 electrons. What are the strength and direction of the electric field 0.1mm above center of the top surface of the plate. Homework Equations n=Q/A E=n/E_0 The Attempt at a Solution\ I found the linear...
  35. N

    Thin conducting plate boundary conditions

    Homework Statement A thin conductor plate is in free space. Its conductivity is finite and thickness is approaching zero. Relate the tangential electric field in either side of the conductor. Repeat for tangential magnetic field. How are electric and magnetic fields related. Homework...
  36. M

    Parallel plate capacitor electric field problem

    Homework Statement Two circular disks spaced 0.50 mm apart form a parallel-plate capacitor. Transferring 1.8*10^9 electrons from one disk to the other causes the electric field strength to be 1.3* 10^5 N/C. What are the diameters of the disks? Homework Equations F=k(q1)(q2)/r^2...
  37. A

    Induced charge in conducting plate

    one conducting plate is at origin of xy plane. and +q is at distance of d from y-axis in the direction of z axis. then what is induced charge in conducting plate & how charge is distributed on plate?
  38. F

    Determine the thickness of steel plate (based on S275 steel)

    Hi I needed to design for a steel plate of S275 steel (275 N/mm2) that will resist a tensile force = 2 x 65 kN = 130 kN. The steel plate must not bend due to this tensile force = 130 kN. And I need to determine the minimum steel plate thickness that will resist the bending (due to the...
  39. Z

    The Age of Plate Tectonics: When Did It Begin?

    When did plate tectonics start? http://en.wikipedia.org/wiki/Plate_tectonics"
  40. Z

    Laplace Equation on semi-infinite plate

    Hello all! I just finished the following problem: Consider a thin semi-infinite plate of negligible thickness made of an isotropic conductive material. A voltage V0=1V is applied at x=0 on the plate (across the short dimension). At a distance x=d=1cm from the end (x=0) V is measured to be...
  41. L

    Circular Parallel Plate Capacitor

    I haven't figured it out yet, I find it way above my understanding of phyiscs Suppose we have two circular parallel plates or radii r, both the same radius. They have a Voltage difference of V and they are separated a distance d. What would be the Electric Field in the whole space? Actually...
  42. L

    How to measure the charges stored in a capacitor when the plate space changes?

    1. Basically this was a question directed by my subject lecturer. He needs me to describe a method on how to measure the amount of charges stored versus the spacing between the plates of a capacitor. 2. There are many types of ways and equations to measure the amount of charges stored but...
  43. S

    What is the Work Required to Increase Separation of a Parallel Plate Capacitor?

    Homework Statement An isolated parallel-plate capacitor (not connected to a battery) has a charge of Q=1.4x10^-5 C. The separation between the plates initially is d=1.2 mm, and for this separation the capacitance is 3.1x10^-11 F. Calculate the work that must be don to pull the plates apart...
  44. T

    Ruben-Chladni Plate: Combining Two Physics Experiments

    Hello ! I'd like to make a combination of two great basic physics experiments : 1) The Chladni plate : http://www.youtube.com/watch?v=wio728lLOh0&feature=related 2) Ruben's tube : I'd like to construct a thin parallelepiped (50x1000x1000 mm) with one of the large plate covered with...
  45. E

    Plate - E - Plate (Reasoning Needed more than Answer)

    Homework Statement Two large metal plates of 1m^2 are separated by a distance .05m^2 and carry equal and opposite charges on their inner surfaces. If E between the plates is 55 N/C, what is their charge? Neglect edge effects Homework Equations \int \vec{E}\cdot d\vec{s} \epsilon_0EA=Q...
  46. L

    Beam theory or plate theory

    Can somebody provide some clarification: I am calculating the stress in a plate with the following dimensions: 41" long by 30" wide and the plate is 3/8" thick. The plate is simply supported along the 41" length sides, with the short lengths free. I have calculated the stress using beam theory...
  47. 3

    Calculating upright loads to base plate

    Hello PF I hope you can give me some guidance. This is something that I am getting more and more on my desk, to be honest I don't understand it enough to give an answer. I have searched the net looking for an answer but can only find details on fulcrum points class 1,2 & 3 which does not seem to...
  48. A

    Electrostatics - parallel plate capacitor

    Two parallel uniform charged circular conducting metal disks contains a charge of +Q and -Q on the inner surfaces, and little amounts of charge +q and -q on the outer surfaces. The detail is shown in the diagram. Each plate has a radius R and thickness t. The separation of the plates is d...
  49. Link

    Whats the sound that you hear from scratching a fork on a plate called

    The sound is generated not exclusively by fork on a plate, but from other things such as scratching your nails against paper or sliding chalk on the blackboard. They all make you feel like your heads going to blow up. What is this phenomenon called, and how can the uncomfortable feelings...
  50. A

    Parallel plate capacitor problem

    A parallel plate capacitor is formed using a material whose dielectric constant is 3,00 and whose dielectric strength is 2x10^{8} V/m. The capacitance is 0,25x10^{-6}F and the capacitor must withstand a potential difference maximum of 4000V. Find the minimum area of the plates of the capacitor...
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