Plate Definition and 960 Threads

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...

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...

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 =...

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)...

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...

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 *...

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...

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...

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...

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?

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...

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...

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.

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...

Are live plate tectonics unique?

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...

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

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...

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...

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...

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...

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?

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?

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...

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...

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...

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...

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...

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.

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.

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...

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?

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...

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...

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...

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...

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...

Hi, I have trouble on the following problem: Given a parallel plate capacitor, fixed area A, and fixed separation d. Find the energy stored, before and after insertion of a slab of dielectric, which completely fills the space between plates, for each of the two cases: a) Plates are...

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 7.00×106 m/s. The capacitor is 2.00 cm long, and its plates are separated by 0.150 cm. Assume that the electric field between the...

Here's the question. The drawing (attached) shows an electron entering the lower left side of a parallel plate capacitor and exiting at the upper right side. The inital speed of the electron is 7.00x 10^6m/s. The capacitor is 2.00cm long, and its plates are separated by 0.150cm. Assume that...

A small plastic ball of mass 6.95×10-3 kg and charge +0.11 mC 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 0.0152 m2. What is the...

The purpose of this thread is to present an analysis of the attraction of a particle to a solid disk of material of density rho. It will be shown that the result is finite and very small - and incidentally that the accleration is nearly uniform along the vertical axis regardless of one's height...

How do i find the period of small oscillations and length of the equivalent simple pendulum, for a rectangular plate (edges a and b) suspended at its corner and oscillating in vertical plane? T = 2pi (I/mgl)^1/2 i calculated l (length) to be (a^2 + b^2 )^1/2 ---(the diagonal) is this right...

How do i find using integrals, I of a rectangular plate with sides a and b with respect to side b? I know i have to use the equation I = integral of (a^2 dm) and i know density = m/ab but I'm having trouble figuring out the mass element. Can someone tell me what the mass element is? and...

Hi, I have this question: I am a little confused about the electric field of a very large sheet of something (insulator or conductor) for a very large sheet, E = sigma_inclosed/2(epsilon_naught), but for a conductor, it is E = sigma_inclosed/epsilon_naught, that is, twice the first case. But...

Q. While thinking about your physics homework, you drop one of your mom's dinner plates on the floor breaking it into three pieces. The second piece has a mass of 2 times the first piece and flys off perpendicular to it. These first two pieces both have a speed of 2.6 m/sec. The third piece...

I have a lab to do tomorrow with this topic. Just wondering if anyone can tell me a brief summary of what this is about and what I should be looking to accomplish/learn

Please explain how I calc the hydrostatic force and it's location on the plate. Above the drawing is says: A 10m equlateral plate under water Assume 60 degrees F I clicked on 'Manage Attatchments' to upload the drawing. Give me a minute to do it another way if it won't show up...

if you dropped a steel marble onto a steel plate and then dropped a steel marble onto a glass plate which would you expect to bounce higher?

The system is a parallel plate capacitor, top plate has charge density sigma, bottom play has charge density -sigma. I'm looking for the "field momentum" inside the cubic volume Omega shown in the picture. My book (Griffiths) is a little unclear on exactly what this is, and seems to be...