According to Latter Day Saint belief, the golden plates (also called the gold plates or in some 19th-century literature, the golden bible) are the source from which Joseph Smith translated the Book of Mormon, a sacred text of the faith. Some witnesses described the plates as weighing from 30 to 60 pounds (14 to 27 kg), gold in color, and composed of thin metallic pages engraved with hieroglyphics on both sides and bound with three D-shaped rings.Smith said that he found the plates on September 22, 1823, on a hill near his home in Manchester, New York, after the angel Moroni directed him to a buried stone box. He said that the angel prevented him from taking the plates but instructed him to return to the same location in a year. He returned to that site every year, but it was not until September 1827 that he recovered the plates on his fourth annual attempt to retrieve them. He returned home with a heavy object wrapped in a frock, which he then put in a box. He allowed others to heft the box but said that the angel had forbidden him to show the plates to anyone until they had been translated from their original "reformed Egyptian" language.
Smith dictated the text of the plates while a scribe wrote down the words which would later become the Book of Mormon. Eyewitnesses to the process said Smith translated the plates, not by looking directly at them, but by looking through a transparent seer stone in the bottom of his hat. Smith published the first edition of the translation in March of 1830 as the Book of Mormon, with a print run of 5,000 copies at a production cost of $3,000 (or 60 cents per book).
Smith eventually obtained testimonies from 11 men who said that they had seen the plates, known as the Book of Mormon witnesses. After the translation was complete, Smith said that he returned the plates to the angel Moroni; thus they could never be examined. Latter Day Saints believe the account of the golden plates as a matter of faith, and critics often assert that either Smith manufactured them himself or that the Book of Mormon witnesses based their testimony on visions rather than physical experience.
Hi,
I'm a student working at CERN. Currently I am to learn about the function and operation of microchannel plates (http://en.wikipedia.org/wiki/Microchannel_plate_detector), therefore I am wondering if anyone has a good tip on where in the litterature I can read up on them?
Olof
Hi
Here is the problem.
Two infinite conducting plates 1 and 2 are separated by distance L. A point charge q is located between the plates , at a distance x from plate 1. Find the charges induced on each plate.
This is a problem from "Problems in general physics" by Igor Irodov. The...
Homework Statement
Hi
This is a problem from problem book by russian author, Igor Irodov.
Four large metal plates are located at a small distance d from one another as shown in the figure. The extreme plates are connected by a metal wire, while the potential difference V is applied to...
I Have an object with a mass of 30,000 lb falling at a height of 90ft. The object is to be stopped by a series of diaphragms spaced out 6" apart. I am using 1" welded plates as diaphrams. I need to find out how many plates it takes to stop the object. I have calculated my potential...
Hi All,
I'm familiar with the theory of how the soil can represented by means of FEM and how soil-structure interaction is being established. Most of books are pointing out at the Winkler -springs implemented mostly for beams and quadrilaterals (4 node) FEM elements. There are obviously...
In regards to measuring two photons in the 45/135 basis using 22.5 wave plates and PBS orientated in the H/V basis:
Is it with the entanglement |H>|V> - |V>|H>, with the wave plates:
H -> 45
V -> 135
so
|45>|135> - |135>|45>
And back again using a PBS:
|H>|V> - |V>|H>
So getting |H>...
Homework Statement
Suppose there are 2 mettalic plates 1(left)&2(right). Left plate is grounded and right plate is given surface charge density sigma. Now since potential of left plate is 0, so there is no potential difference difference between infinity and plate and since field has to be...
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 everyone,
I'm very new to microbiology and does not have any background knowledge, so I have some simple questions on identifying different bacteria on agar plates. I have some questions and I have answered them the way I think. Please correct me where nessecary.
1. First of all...
Homework Statement
In the figure, a uniform, upward-pointing electric field E of magnitude 4.50×10^3 N/C has been set up between two horizontal plates by charging the lower plate positively and the upper plate negatively. The plates have length L = 4 cm and separation d = 2.00 cm. Electrons...
Plz help-Numerical based on 3 parallel plates -Find the charge problem
Q} Three identical metal plates with large surface areas are kept parallel to each other.The leftmost plate is given a charge Q and the rightmost plate a charge -Q and the middle one remains neutral.Find the charge appearing...
Working along step-by-step with a text and I'm stumped as to how they reached a conclusion. In the first picture you see two plates aligned at an unspecified angle, theta. One plate is at a potential V and the other is grounded. The distance between the plates at one end is d, and at the other...
Our professor gave us a lecture about sensors tonight, but I'm kind of confused about the principals of capacitive touch screen.
As the attached figure shows, when finger touches the screen , capacitance is formed between finger and the ITO bars, but is it true for all the ITO bars?
It's...
i'm reposting this question as nobody answered it previously. please answer it this time.
in given type of arrangement we normally take it equivalent to two capacitors(plate 1 and surface 2) and (surface 2 and plate 3) in series. My question is that a capacitor is formed with two plates of...
What is the moment of inertia of a rectangular plate making an angle except right angle or multiple of right angle with it's axis which is passing through the centroid of the plate?
Hello All,
I have noticed that a similar question have been asked many times here, but I still have doubts how to solve the parallel plates problem defined below:
Homework Statement
We have two freely moving parallel plates of area A, separated by distance d, one is grounded and the other is...
Hello,
I have been given a project in which I have to design a ramp powered by a motor and gear-train. For the actual "deck" which the vehicles will roll on I have selected two 5mm Al 6061 T6 plates which are bolted together. The bottom plate will have 4 cut-outs taken from it and act as a...
Homework Statement
Two parallel plates are separated by 10.0cm and a potential difference of 500.0V is maintained between them. What is the force on an electron between the plates?
Homework Equations
The Attempt at a Solution
E = F / q = kQ / r2
V = kQ / r = Er = Fr / q
F = Vq /...
Homework Statement
Two capacitors are identical, except that one is empty and the other is filled with a dielectric (k=3.6). The empty capacitor is connected to a -11V battery. What must be the potential difference across the plates of the capacitor filled with a dielectric so that it stores...
Homework Statement
Two flat charged plates create a uniform electric field (E). What happens to voltage (V) when the distance (d) is doubled?
Homework Equations
Voltage in uniform electric field:
V = E*d
Capacitance equations:
V = Q/C
C = K * A/d
The Attempt at a Solution...
Homework Statement
In an oscilloscope, an electron is accelerated from rest through a voltage of 1.14x103 V. It then passes through deflecting plates 2.00 cm apart, across which there is a voltage of 412 V. Its velocity when it enters the plates is perpendicular to the electric field of the...
Hey, how would I start solving the total radiation transmitted through one plate, an air gap then another plate (double glazing) as well as the total convective heat transfer across the two plates?
Thanks!
Homework Statement
Two infinite sheets of current flow parallel to the y-z plane. The left-hand sheet, which intersects the x-axis at x = 0, consists of an infinite array of wires parallel to the z-axis with a density n = 960 wires/m and a current per wire of IL = 0.15 A in the +z direction...
A proton, mass 1.67 x 10^-27 kg , is projected horizontally midway between two parallel plates that are separated by 0.8 cm , with an electrical field with magnitude 7.2 x 10^5 N/C between the plates. If the plates are 4.70cm long, find the minimum speed of the proton that just misses the lower...
Electric field magnitude between capacitor plates independent of distance? [SOLVED]
The electric field of a point charge Q is defined as
E=\frac{F}{q}=\frac{\frac{1}{4\pi \varepsilon _{0}}\frac{Qq}{r^{2}}}{q}=\frac{1}{4\pi \varepsilon _{0}}\frac{Q}{r^{2}}
where q is the test charge. The...
Hi All
I'm a professional Electronics Engineer and very much an amateur physicist. I'm trying to find the force exerted between 2 parallel plates for a given plate voltage, separation, and plate area.
I've found plenty of wiki's, google pages etc etc of force between 2 point charges...
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...
The problem is attached, stuck on part d.
Homework Statement
Im given a problem with two horizontal and parallel plates 8cm long 3cm away from each other. An electron is moving through them with a velocity V_{0}. It is also given that the voltage across the plates is 20 Volts and the...
Homework Statement
I have attached the problem with a diagram.
Homework Equations
flux = EA = Qencl/εo
The Attempt at a Solution
I am confused about how I can find the charge densities on each surface. What I think is that the 5C will spread to both surfaces of plate one so...
Homework Statement
I was looking at
http://hyperphysics.phy-astr.gsu.edu/hbase/electric/elesht.html
(scroll down a little on the link)
Homework Equations
The Attempt at a Solution
Would it be correct to say that the decay in the electric field between the plates is...
Homework Statement
A moving proton has 6.4x10^-16 J of kinetic energy. The proton is accelerated by a potential difference of 5000 V between parallel plates.
http://members.shaw.ca/barry-barclay/Self-Tests/test09/elecst17.gif
The proton emerges from the parallel plates with what...
If we produce a three-pair of entangled photons, and send two of them towards polarising beam splitters, and one towards a vertically aligned wave plate - according to QM we need to describe the photon as being in a superposition of V and H when they hit the beam splitters, but when the photon...
An electron, initially at rest, is accelerated through a potential difference of 600 V between two parallel plates.
The plate on the bottom is @ 0 V. The top plate is 600 V. And the distance between the two is 4.2 x 10^-2 m.
Calculate the kinetic energy gained.
Alright, so initially I was...
Homework Statement
http://img716.imageshack.us/img716/7692/picture8sj.png
Homework Equations
ΔEp=QV
Ek=0.5mv2The Attempt at a Solution
I'm making sure I understand what's going on here. Please bare with me.
ΔEp = Ek
.5mv2 = Q(1200+V)
Solving for V, I get -642V.
In a nutshell, is this what...
Homework Statement
Electrons are accelerated from REST by a potential difference of 1.0 x 10^3 volts
They pass midway between two flat parallel plates 0.15m long and 0.030m apart. The electric field between the plates has a magnitude of 2.0 x 10^3 N/C. Determine how far an electron will be...
So for just vacuum in between one could say F=q*E = (σA)*(σ/2ε0) = A*σ^2 / (2ε0)
Alternatively, F = dU/dx, where x is the separation. U = 1/2 CV^2 = 1/2 QV = x*A*σ^2 / (2ε0). To get V, we just add up pieces of E-field*distance.
But now let's say part of x is a dielectric of thickness t...
I know that I should do my homework, but I lost all my notes because of the flood brought by "Sendong" a storm in the Philippines. I just need the equations to be used to solve the problem that was given to us. So here it is:
A parallel plate capacitor has a capacitance of 7MF when filled...
Okay guys, I have a question and I am sure the answer is stupidly obvious but I can't seem to find a equation explaining it. I want to know the max possible voltage of the capacitor based on the distance between the plates, the Area of the plates, and the resistance of the material between the...
Homework Statement
The bent plate has a mass of 70kg per square meter of surface area and revolves about the z-axis at the rate w=30rad/sec. Determine the angular momentum H of the plate about the z-axis. (Neglect the mass of the hub and the thickness of the plate)...
Homework Statement
Two parallel sheets of conducting metal are very close to each other (A>>d), they have charges of Q1 and Q2 on them. What is the force between these two plates?
Homework Equations
Gauss' Law
The Attempt at a Solution
From what I understand, you can use Gauss'...
Hi.
I am working on a project for the design of a capacitive sensor. In order to do that, I am required to compute capacitance using a simulation software like COMSOL. As I want to compare my simulation results with the theoretical results, I would like to know the formula to be used for the...
Two infinite plates are in the (x,y,z) space. one in X=5 and the second in X=-5. they are charged with superficial density SIGMA. Between them there is a spatial density P. P=A*X^2(X is the variable and A is constant. out the space(for example=X=10 or x=-10) the Electric field is 0.
I have to...
Has anyone every tried to make an inductor made out of capacitors, that is to say, which uses the magnetic field of displacement current rather than that of electron current to generate magnetic fields? Let's say the gap between plates is greater than the thickness of each plate. Wouldn't most...
I don't understand why the electric field intensity is uniform between parallel plates. No explanation in my textbook...
Surely as a charge moves up/down between the plates, parallel to the lines of the field, the electric force that it experiences would change (using Coulomb's law)?
hello all
I have this problem to solve in ansys workbench 13 (Im new to this software): two parallel 5000mm length square beams in contact 200x80x8 (EN10219: structural hollow sections ) in frictionless contact and on the sides two side plates. At the ends I have two suports and I have on top...
Homework Statement
A TE_10 mode is propagating in a rectangular waveguide along the z-axis. If the waveguide is terminated with a perfectly conducting metal plate normal to the z-axis, then 100% of the electromagnetic radiation propagating in the guide will be reflected by the metal plate...
Potential between two angled plates?
I have a problem involving two angled plates
Diagram
http://imageshack.us/photo/my-images/841/paintzr.jpg/
L=10cm
d=1mm
\phi= 1°
Where I'm supposed to find the potential at any point between the plates. I recognize that I'm supposed to use the...
Homework Statement
Four parallel metal plates P1, P2, P3, and P4, each of area 7.50 cm2, are separated successively by a distance d = 1.06 mm, as shown in the figure below. P1 is connected to the negative terminal of a battery, and P2 to the positive terminal. The battery maintains a potential...