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.
Homework Statement
Homework EquationsThe Attempt at a Solution
E=kq/r2
so when the distance increase E should decrease?
I know this is wrong, but can someone explain why? Thanks
Hello,
I think I solved the question, but I am confused by the elaboration on the exercise given by my professor.
1. Homework Statement
A very large plate charged with charge Q is placed between x = -d and x=0. A similar plate charged with charge 3*Q/2 is placed between x = 3*s and x = 3*s +...
Homework Statement
Use “virtual work” to calculate the attractive force between conductors in the parallel plate capacitor (area A, separation z). That is, use conservation of energy to determine how much work must be done to move one plate by an infinitesimal amount, and then use the value of...
I have learned that the electric field between parallel plates are independent of distance
since E=V/d
so if I increase the distance between parallel plates, the E will decrease, right?
if I am right on the previous statement, then why does the electric field are independent of distance?
Homework Statement
I am trying to calculate the theoretical time that it takes for a small piece of aluminium foil on a bottom plate to reach a top plate. The plates have a potential difference created by a 3kV Cockcroft–Walton generator. The plates are short cylinders with a surface area of...
As one know, the intensity Fresnel equations
for the reflected p-polarized light
\begin{equation}\label{a}
\frac{I_{p_{refl}}}{I_{0p}}=\frac {\tan^{2}(i-r)}{{\tan^{2}(i+r)}}
\end{equation}
and for the refracted one is
\begin{equation}\label{b}
\frac{I_{p_{refr}}}{I_{0p}}=1 - \frac...
Homework Statement
Homework EquationsThe Attempt at a Solution
I couldn't find the V(x).I don't know ho to write the equation.I think that it will be constant cause potential betwwen two plates should be constant... ?
Homework Statement
In attachments
Homework Equations
The Attempt at a Solution
This is my charge distrubition.From there I draw electric field lines.And then from potential difference I wrote
##E=\frac {V} {d}## and then...
Hi, I'm trying to do some figuring on vapor pressures. If one were to take two plates heated to 220F and press water between them in a press that exerts 100psi, what would the resulting vapor pressure of the water be?
Now, what temperature would you heat the plates to if you were using a press...
Homework Statement
Can't really find out b, probably due to a mistake in a. Was wondering what I did wrong.
Homework Equations
Kinematic equations of motion, w/ constant a
##F=qE##
The Attempt at a Solution
[/B]
(a)
##E=\frac {\Delta V} {\Delta d}= \frac {V_R-V_L} {L} = \frac {V_0}{L} ##...
Homework Statement
Two parallel circular plates with radius 7.0 mm carrying equal magnitude surface charge of Q = 4.618 x 10-10 C are separated by a distance of d = 1.0 mm (0.001 m). How much stored energy do the plates have?
Homework Equations
Acircle = π r2
C = ∈0⋅A / d
PE = 1/2 ⋅ Q2 / C
PE...
Hi folks, this is not an actual HW question, but rather one of personal interest. I'm basically trying to understand your classic idealized parallel plate capacitor, but moving face-on through a plasma.
1. Homework Statement
We have a diffuse neutral plasma made of free protons and electrons...
Why does the electric field strength on a straight line (E = k.(Q1/d12+Q2/d22). D1,2 = distance with respect to Q1,Q2) between two point charges vary with the location on this line while the field strength between two parallel plates which remains the same anywhere between the plates...
Homework Statement
Two large metal plates of area 1.1 m^2 face each other, 6.2 cm apart, with equal charge magnitudes but opposite signs. The field magnitude E between them (neglect fringing) is 50 N/C. Find |q|.Homework Equations
|q|=σA
E=σ/(2Eo)⇒σ=2EoE
|q|=2EoEA
The Attempt at a Solution
I...
Homework Statement
Two parallel plates 1.40 cm apart are equally and oppositely charged. An electron is released from rest at the surface of the negative plate and simultaneously a proton is released from rest at the surface of the positive plate. How far from the negative plate is the point at...
Homework Statement
An electron is launched between two parallel, neutral, conducting plates that are each L long and separated by a distance d with a uniform magnetic field of magnitude B permeated between them.
(a) What is the minimum speed the particle must have to traverse the region...
Homework Statement
The mass of the ball is 40 milligrams, the applied potential difference is 480 V and the plate separation is 6 centimeters. If the string hangs at an angle of 20 degrees to the vertical, determine the charge on the pith ball.
Homework Equations
[/B]
F=ma
E=F/q
V=E/d
The...
Take the case where the electron-beam is oscillating between two parallel metal plates, there will be alternating potential developed between the plates as metal tries to negate all external electric fields.
My query is,
(1) How to calculate the potential developed and possible way to simulate...
1. Homework Statement
A fixed parallel plate capacitor is charged. A point charge is starting to move with an initial speed 1.0 m/s at shown initial position. The capacitance is 5.0 F. The mass of the point charge is 0.80 kg. Assume that the plate length is infinite. No gravity. The initial...
Hi, I am aware that quater-wave plates create a phase shifts of λ / 4 between the fast and slow transmission axis. My question is what happens if we place two quater-wave plates in series so that there is 0 degrees between the fast transmission axis and how would result change if they where...
Have any experiments on the Casimir effect tried what happens if the plates are temporarily magnetized when they are pulled together by the effect? E.g. measurements of what happens to passing laser beams and the like?
Homework Statement
An α-particle accelerated between a pair of parallel plates in a vacuum tube acquires a kinetic energy of 103 eV. What is the potential difference between the plates?
Answer: 500 V
2. The attempt at a solution
Well, it's 1000 / 2 = 500 V because there are two plates. But I...
Hello.
I'm now taking accelerator physics class and the lectures said in the thermionic electron gun, anode metal mesh should be grounded in order to prevent electrons which traveled beyond the mesh from coming back due to the electric field lines.
Without grounding of the anode, I believe...
Homework Statement
Four uncharged metal plates of the same area are placed in vacuum and separated by equal distances. They are connected by conducting wires to two resistors, two open switches and a battery. The thickness of the plates is negligible, and their area is sufficiently large. S1 is...
If a polarised molecule, e.g NH3 or H20 (Vapour molecule) or Butane is between two plates, of opposite charge,
would the charges serve to trap the molecule between the plates?
Hello,
I am trying to model an electric setup in ANSYS Workbench. I want to model some charged surfaces surrounded by charges. Then these are in an electric field created by two electrodes. I uploaded an image for visual aid.
I have been playing around with the software for a while an am...
Homework Statement
Two large non-conducting plates of surface area A=.025m^2 carry equal but opposite charges Q = 75microC. What is the energy density of the electric field between the two plates.
Homework Equations
I wrote the equations on my attempt. This was a multiple choice problem...
Hi,
My setup for measuring parallel plate capacitance consists of an LCR meter and a parallel plate test fixture. The area of the parallel plates is much larger than the area of the samples I am measuring. From what I've seen in literature, and my physics classes, the sample area should be...
What will happen to the force between the capacitor plates (Will increase or decrease or remain constant) if we introduce a dielectric between them?
As per the answer given the physics textbook , the force will remain same? But as per my understanding the force should decrease since electrical...
Homework Statement
A small sphere with charge 2.4 micro coulombs is suspended from a thread between 2 charged plates. The plates have a voltage of 62 and the distance between the plates is 3.1 cm. The sphere hangs at 18 degrees to the vertical.
Homework Equations
E = V/r
FE = Eq
Fnetx = FE -...
Homework Statement
My teacher told me that the force will increase ##k^2## times, where ##k## is the dielectric constant, but I don't see how.
Homework EquationsThe Attempt at a Solution
To start with, with no dielectric, the force between the plates is given by ##\frac{q^2}{2A\epsilon_{0}}##...
Homework Statement
In the figure two large, thin metal plates are parallel and close to each other. On their inner faces, the plates have excess surface charge densities of opposite signs and magnitude 7.76 × 10-22 C/m2. What is the magnitude of the electric field at points (a) to the left of...
Homework Statement
The volume between two infinite plates located at x=L and x=-L respectively is filled with a uniform charge density ##\rho##. Calculate the electric field in the regions above, between and below the plates. Calculate the potential difference between the points x=-L and x=L...
Homework Statement
Imagine if you have two charged plates which have the same magnitude but opposite in charges.
If you place an uncharged object near of the positive plate what will happen?
Homework Equations
I don't think it depends on equations
The Attempt at a Solution
Okay, so If you rub...
Homework Statement
Two parallel glass plates of index of refraction n
are separated by an air film of thickness d. Light of wavelength λ
in air, normally incident on the plates, is intensified
on reflection when, for some integer m
a) 2d=mλ
b) 2d=mλ/n
c) 2d=mnλ
d) 2d=(m+1/2)λ
e) 2d=mλ/2...
For a system of 'n' parallel plates(metal plates) bearing charges q1, q2,... qn ; why it is so that the facing surfaces of the plates bear equal and opposite charges ?
How do we prove that ?
Homework Statement
This problem propped in my head yesterday related to a project I'm working on (not homework, I'm not in school, but I thought this was the best place for it) and I just can't figure out how to crack it! If we have a large plate made up of nxn smaller plates, what is the...
Homework Statement
The figure shows cross-sections through two large, parallel, nonconducting sheets with identical distributions of positive charge with surface charge density σ = 1.06 × 10-22 C/m2. What is the y component of the electric field at points (a) above the sheets, (b) between them...
Homework Statement
A charged particle (either an electron or a proton) is moving rightward between two parallel charged plates separated by distance d=2.87mm. The plate potentials are V1=-75.8V and V2=-49V. The particle is slowing from an initial speed of 90.0 km/s at the left plate. What is...
Homework Statement
A capacitor with two parallel plates of area 88.5 cm2 and nylon (dielectric strength 14 MV/m) inserted between them breaks down when a potential difference of 5.80 kV is applied. What is the maximum charge the plates will hold when the nylon is removed and the space filled...
Homework Statement
A small plastic ball of mass 7.51 × 10-3 kg and charge +0.123http://edugen.wileyplus.com/edugen/courses/crs6407/art/qb/qu/c18/lower_mu.gifC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with...
If I have a capacitor and I maintain the potential difference between the two plates as I move them apart would I have to do any work (other than mechanical work) to move them apart? my logic tells be I shouldn't have to as I'm not doing any work again the potential field? Just wondered what you...
Homework Statement
Two large parallel plates are 0.8 m apart and generate an electric field of 12 N/C between them.
At 0, 1/4, 1/2, 3/4, and full distance (0.8m), how much kinetic energy does a +0.25 C charge gain as it passes through each location?
Homework Equations
V = PE/q
The Attempt...
Homework Statement
Two large, parallel, conducting plates are 7.5 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces. An electrostatic force of 1.3 × 10-15 N acts on an electron placed anywhere between the two plates. (Neglect fringing.)
Find the magnitude...
whenever any plate of system of parallel plates is earthed total charge on outer faces of the plates will become zero .Is it always true?or only in case of system of two plates?
When a capacitor is connected to battery then positive charge is induced on one plate and a negative charge is induced on another plate.Now what happens to the charges that are induced on opposite sides of each plate i.e. on plate with positive charge a negative charge would be induced on...
I know that peltier plates are for cooling(mostly :smile:) but I wish to try out heating other substances using peltier plates.
I'm planning to use 3 peltier plates (TEC1-12712) [maximum temperature difference of 70 degrees measured at 25 degrees / Maximum temperature difference of 80 degrees...