Plate Definition and 960 Threads

Force act on dielectric slab on inserting between the parallel plate = [8.85 * 10^-12]b(k-1)(V^2)/2d where b = width of the plate , d = distance b/w the plates , V is the constant potential difference across the plates and k = dielectric constant Which force is acting on dielectric...

Despite the name interceptor, this is marine as in water, not marine as in marine corps. Interceptor plate on a boat is like a horizontal flap (airbrake, alieron, elevator) on an aircraft but is mounted below the water. Usually it's a flat rectangle (not airfoil) that drops down from the bottom...

Homework Statement We are having two the same metal plates. Plate one is having a temp of 127 degree celsius and plate two is 27 degrees celsius. Then a third plate, the same as the other two, is paced in the middle. What is his temperature? Homework Equations Don't really know. Maybe...

Homework Statement Two capacitors, C1 and C2, are separately charged to 166 C and 348 C, respectively. They are then attached in parallel so that the + plate of one goes to the - plate of the other, and vice versa, as shown on the diagram below (notice how C2 was rotated 180 degrees before...

The potential difference between two large parallel plates is varied as V=at; a is a positive constant and t is time. An electron starts from rest at t=0 from the plate which is at lower potential. If the distance between the plates is L, mass of electron m and charge on electron -e then find...

Hello, i am new to the forums here so forgive me if I have mistakenly started a matching thread that already exists. So i have a task for building a parallel plate capacitor for two aluminum plates connected to a battery on opposite terminals. The target capacitance is 2000 microfarads. with...

Homework Statement A small positively charged sphere of mass m is attached to a very large positively charged vertical plate by a string and hangs due to gravity. The charge density on the plate, σ, is uniform. a) Calculate the equilibrium position of the ball as a function of the (uniformly...

This is for prelim study. Just wondering if this solution is correct. Problem A thin homogeneous plate lies in the x-y plane. Its moment of inertia tensor in the x,y,z basis is given by \textbf{I}=σl^{4}\begin{pmatrix} 2 & -2 &0 \\ -1 & 2 & 0 \\ 0 & 0 & 4\end{pmatrix} If the plate...

Electromagnetics -- parallel plate capacitor energy storage Homework Statement A parallel-plate capacitor 0.5m by 1.0m has a separation distance of 2cm and a voltage difference of 10V. Find the stored energy, assuming that ε=εo. If a 200-volt potential is applied in the capacitor, (a)...

It's that time of year again...time to renew my license plate! I currently have a generic one. Boring! So I'm trying to think up a new one. Some ideas I've thought of or heard: LIMSUP, LIMINF, RLANLYS, PR MTH, AXMFCHC. So I like math. But anything geeky could work. Ideas anyone? (Limit to 7...

Homework Statement "An electron is fired from a negative plate towards a hole in a positive plate. It then passes between two parallel plates that are 3 cm long and 2 cm apart with a voltage of 550 volts across them. If the accelerating voltage across the two original plates is 900 volts what...

A 2-m x 3-m flat plate is suspended in a room, and is subjected to air flow parallel to its surfaces along its 3-m-long side. The free stream temperature and velocity of the air are 20oC and 7m/s. the total drag force acting on the plate is measured to be 0.86N. Determine the average heat...

Hi ,i need books, sites... about Mindlin's Theory for thin plate Hi , i need books, sites... about Mindlin's Theory for thin plate (Vibrations). Thanks pmcr

Homework Statement Find the electric field above the center of a flat circular plate of radius a when the charge distribution is br^{2}δ(z) for r≤aHomework Equations The Attempt at a Solution i didn't get the intgeral resulting form coulomb's law working, so i tried with the potential, the...

Homework Statement Consider a flat plate subject to parrallel flow (top and bottom) characterized by u∞ = 5 m/s and T∞ = 20°C. Determine the average convection heat transfer coefficient and convective heat transfer rate with an L = 2m long and w = 2m wide flat plate for airflow and...

Hi. I am confused about plate boundaries. In school we always drew diagrams where the continental crust sat on top of the oceanic crust. With that in mind, what is a collision boundary? Is this where continental crust sits on top of the mantle? How did India collide with Asia? Is the Indian...

Homework Statement A 10 gram pith ball having a charge of 1μC is electrostatically attracted to one of the inside surfaces of a large parallel plate capacitor by an electric field between the plates. The plates are vertically oriented so that the electric field between the plates is...

Homework Statement A 10 gram pith ball having a charge of 1μC is electrostatically attracted to one of the inside surfaces of a large parallel plate capacitor by an electric field between the plates. The plates are vertically oriented so that the electric field between the plates is...

Hello, Before I get barraged with comments about this being a homework question it isn't. It is about helping me understand inertia. I am trying to understand how to chose which form of equation for the rod and which form of equation for the plate in the diagram attached. Am i right in...

Homework Statement A vacuum parallel plate capacitor is given. Its plates are of thickness h, width L (in the plane of the figure) and their distance is D. The plates of the capacitor are perpendicular to the plane of the figure, which is at the same time the symmetry plane of the...

Suppose I have a rigid circular metal plate that takes sound X microseconds to cross. What frequency would I have to vibrate that plate to get standing waves that form seven concentric circles? The obvious answer is 14X but I'm not sure. BTW, this is not homework.

Homework Statement Use Gauss' law to find an expression for the electric field within a charged parallel plate capacitor with two layers of dielectric materials (?r1 and ?r2). (See attached image, this is for question 2a). The Attempt at a Solution My approach would be to split the...

Hello, I am no mechanical engineer and my knowledge in bending is limited to Euler-Bernouilli beam theory. I wish to analytically calculate the normal stress of a plate bent by four points bending. I have already calculated this stress for a beam. However I cannot apply the beam theory...

Homework Statement hi I'm trying to design a small experiment based on soil pressure i've not had much use of some of the equations and principles for a few years so I'm a little rusty basicly I'm trying to exert pressures onto grass seeds (lolium perenne) in a rough field experiment in...

Homework Statement So I need to know how to attack a problem for a solid metal plate. The plate is used as a manhole cover, so it needs to withstand a certain load. The load is calculated by placing a large weight at the centre of area 25x25. I can't for the life of me figure out how to do...

Homework Statement In a region of space between the plates of a parallel plate capacitor 14.0 cm apart, the electric field is 5.50 V/m everywhere. What force would be exerted on a point charge of charge value 2.50 C located 1 cm below the positive plate? 1 cm above the negative plate...

Homework Statement Hi everyone, I'm new here at posting but have found this forum very useful in the past. I have hit a snag with a capacitor problem... any thoughts? Assume you have a parallel plate capacitor separated by one cm of air and one cm of a dielectric with a dielectric constant of...

I'm doing stress analysis on a circular region on this part where an o-ring seals against. There is a 7500 PSI normal force being applied on it. So you can think about it as an annular circular flat plate (like a washer) with the 7500 PSI force uniformally distributed on the surface. I want...

Homework Statement A charged plate (record) is rotating with frequency "f". What is the magnetic field generated in the middle of the record? Homework Equations R...radius f...frequency Q...electric charge B=? The Attempt at a Solution My idea was that the field in the middle is...

Hi, I have a capacitor in which the first plate is connected to 3.3V and the second plate is connected to ground. A third plate which is connected to 2.5V is inserted in between the two plates. Will the capacitance between 3.3V and ground remains? If yes, will it be larger? Thank you...

There's a circuit with voltage source V resistance R and current i. One section of the circuit has a conductive 'plate' element, connected like this: -----wire-------metal plate------wire----rest of circuit How does the current through the plate vary within the plate? I'm fairly...

http://en.wikipedia.org/wiki/Drag_coefficient from wikipedia, it is written 1.98-2.05 for flat plate perpendicular to flow(2D) , but I have a differrent b/h ratio plate, where h=157mm and b=816mm , b/h=5.197 how to get the drag coefficient in this case? Thanks.

A very, large, thin conducting plate lies in the x-y plane. The plate carries a current in the y direction. The current is uniformly distributed over the plate with σ amperes flowing across each meter of length perpendicular to the current. Use Ampere's Law to find the magnetic field at some...

Hi everyone, Hoping someone can point me in the right direction. I'm trying to find (a theoretical approximation of) the flow rate through a pipe where the pressure is provided by an axial flow impeller, but restricted by an orifice plate. I have (or can get hold of) all the physical...

Homework Statement Charge is distributed uniformly over the surface of a very large thin insulating plate to a density of 5.00 x 10–6 C/m2 . An insulating string connects a tiny charged bob to the vertical plate as shown in the diagram. If the mass of the object is .001 g and the string...

Ok I took E&M about 3 years ago and decided I needed to review it. I'm up to gauss' law and am getting confused about one thing. If you have two infinitely long oppositely charged plates, solving for the total e field inside is done by making two gaussian surfaces that enclose each plate. Doing...

If you have a simple circuit with only a battery and a parallel plate capacitor with a dielectric, what exactly happens when the battery is turned on? Also, if the voltage of a capacitor with a dielectric is less than the EMF of the battery, what happens to the rest of the voltage? One...

Homework Statement A parallel-plate capacitor is charged by being connected to a battery and is then disconnected from the battery. The separation between the plates is then doubled. How does the electric field change? The potential difference? The total energy? Explain your reasoning...

Homework Statement How does a parallel plate capacitor work (conceptually)? Also how does each plate get charged? Homework Equations The Attempt at a Solution

Homework Statement A 5800-nF parallel plate capacitor is connected to a 14-V battery and charged. What is the charge Q on the positive plate of the capacitor? Homework Equations C = Q/V The Attempt at a Solution This looks like a very simple question. The capacitor is fully charged...

I have a question. I am working on a small project for class. We have locking Geneva mechanism that turns a table made of cast iron 72* in .5 seconds. The table mass is calculated to be 7300 kg (D=1.25m, h=.350m). Based on the 72* in .5 seconds, I calculated alpha to be 10.08 rad/s^2...

Hi community member, Regarding the book that I'm reading original writer has used Ni = ai + bi*x + ci*y shape function for the formulation of stiffness matrix for thick triangular plates. The writer has not mentioned in the article that the resulting stiffness matrix is required to be...

Homework Statement Two parallel plates, each having area A = 3118cm2 are connected to the terminals of a battery of voltage Vb = 6 V as shown. The plates are separated by a distance d = 0.35cm. You may assume (contrary to the drawing) that the separation between the plates is small compared...

A parallel-plate air capacitor is made by using two plates 16 cm square, spaced 3.7 mm apart. It is connected to a 12-V battery. What is the capacitance? What is the charge on each plate? What is the electric field between the plates? What is the energy stored in the capacitor? What I...

http://img94.imageshack.us/img94/4392/ppcapqs2.png http://img267.imageshack.us/img267/5059/ppcapqs1.png In this question the charge is calculated by isolating Q in E=surface charge density/absalon not My question is, the electric field of an infinite charged plane is E=surface charge...

Why is it that the field magnitude between two plates in a parallel plate capacitor is given by q/(εA)? In my book it is stated that one plate is of charge +q and the other -q. But if each plate is charged, wouldn't you need to account for the electric field produced by both places making...

Homework Statement Consider a parallel plate air filled capacitor with plate area 10cm2 seperated by a distance 2mm.The potential difference across the plate varies as V=360 sin(2π 106t) volts, where t is in seconds.Neglecting the fringe effects calculate the displacement current flowing...

Two parallel plates are 2.0 cm apart and the electric field strength between them is 1.0 × 10^4 N/C. An electron is launched at a 45 degree angle from the positive plate. What is the maximum initial speed v0 the electron can have without hitting the negative plate? i think the answer is...

Homework Statement An infinite sheet of charge that has a surface charge density of 25.9 nC/ m2 lies in the yz plane, passes through the origin, and is at a potential of 1.32 kV at the point y = 0, z = 0. A long wire having a linear charge density of 81.1 nC/ m lies parallel to the y-axis...

Consider the system on the attached picture showing a rectangular plate attached to a pole by two screws - one in A and one in B. Now to figure out the condition for equilibrium one would calculate the torques around point A and B to find that one screw must be pulling and the other one pushing...