Solid Definition and 1000 Threads

Homework Statement I have just started solid state physics course and we got an assignment to choose one element that we are going to work with. Which element is interesting from a solid state physics point of view (and relatively not too difficult to work with)? Homework Equations...

Total mass? Homework Statement Find the total mass of the part of the solid cylinder x^2 + y^2 ≤ 4 such that x^2 ≤ z ≤ 9 - x^2 , assuming that the mass density is p(x, y, z) = I y I (absolute value of y). I have heard about center of mass but this is throwing me off? The Attempt at a...

How would you find the volume in the first octant of the solid bounded by the cylinder y2+z2=9 and x=6? I tried doing a double integral, both from 0 to 3 of (y2+z2)dydz then multiply by 6, but I keep getting 0.

Homework Statement Aluminium metal is FCC with lattice parameter a=0.405nm. suppose that n Al crystal is illuminated by a beam of neutrons with wavelength \lambda= 1.078 angstrom (a) determine the first 10 allowed reflections, in order of increasing scattering vector, counting...

A bolted assembly consists of a steel bolt A, a brass tube B and a nut C. The nut is turned so that it just secures the tube, and then is tightened one extra turn. Determine the resulting force Fs (in kN) in the steel bolt. The initial length of the tube is L = 158 mm, and the screw pitch is 1mm...

Homework Statement A solid nonconducting sphere of radius R carries a nonuniform charge distribution, with a charge density ρ = ρsr/R, where ρs is a constant and r the distance from the centre of the sphere. Show that i) the total charge on the sphere is Q= πρsR3 and ii) the...

Homework Statement NaCl is a face-centred cubic with a basis at Na(0,0,0) and Cl at (a/2,a/2,a/2) and lattice parameter a = 5.63 angstrom. calculate the separation between nearesr neighbours (Na and Cl). The Attempt at a Solution Just by looking at the NaCl structure the separation...

please name a descent book for solid state physics of undergradute level..please..pleasez. hi... i hav just joined my engineering course for electronics... and I desperately need a descent book for solidstate physics to embark on... note that I'm a begginer in Quantum theory..

Homework Statement Two spheres, each of radius R and carrying uniform charge densities +\rho and -\rho, respectively, are placed so that they partially overlap. Call the vector from the positive centre to the negative centre \vec{d}. Show that the field in the region of overlap is constant...

Homework Statement A cylinder of density RhoO, length L, and cross-section area A floats in a liquid of density RhoF with its axis perpendicular to the surface. Length h of the cylinder is submerged when the cylinder floats at rest. Suppose the cylinder is distance y above its equilibrium...

Homework Statement A uniform solid sphere,rolls without slipping on a horizontal surface with an angular velocity \omega,meets a rough inclined plane of incination 60(degrees).The sphere starts pure rolling up the plane with an angular velocity.Find the new angular velocity . Homework...

Hi. I am having a bit of trouble working through all the formulas for calculating the total composite mass of moving particles. If I could just fill in this 'black and white' and very intuitive example then I will be able to use it as a guide to test everything I'm doing. If we have 2...

Homework Statement Computer the volume of the solid bounded by the xz plane, the yz plane, the xy plane, the planes x = 1 and y = 1, and the surface z = x2 + y2 Homework Equations None. The Attempt at a Solution Since the solid is bounded by the xz plane, the yz plane, the xy...

Homework Statement Hi everyone, I'm supposed to find an expression for the electric potential as a function of r, the radial distance inside a solid and non conducting sphere of radius R. A total charge of q is uniformly distributed throughout its volume. The annoying part is that I'm supposed...

Homework Statement Find the volume of the solid generated where y = 1/x for 1<=x<=5 is rotated about the x axis. Homework Equations I = r^2 dm, sqrt(1 + (dy/dx)^2) dx, The Attempt at a Solution So I have found the length of the curve and can henceforth find surface...

Homework Statement Consider a vertical cone of height h whose horizontal cross-section is an ellipse and whose base is the ellipse with major and minor semi-axes α and β. Verify that the volume of the cone is παβh/3. [ Hint: The area of an ellipse with major and minor semi-axes α and β is...

Why don't the electrons ever hit each other,and when they do what happens? Do the atoms sometimes have more electrons than protons because other electrons from other atoms come close to it and get caught in its orbitals?

Homework Statement Consider the solid obtained by rotating the region bounded by the given curves about y=10 Find the volume V of this solid using DISK METHOD Homework Equations y=5e^-x, y=5, x=4 The Attempt at a Solution setting up the picture easy. but I'm having...

I'm curious. Say you have a solid, positively charged sphere with a uniform charge distribution. Now suppose you place a single, negatively charged electron inside the solid sphere. How will the electron behave? I assume the electrostatic forces exerted on the electron will ultimately tend it...

Homework Statement Greetings everyone I have been been asked to write a 10 page essay on Quantum Energy levels in atomic, molecular, nuclear and solid state physics. My problem is that this is such a huge topic and my knowledge of quantum energy levels and solid state physics is limited...

Homework Statement Hello, I have a problem involving a copper block of mass .25kg. They have a given compressibility due to pressure change, and compressibility due to temperature change. They give the density for copper as well. They tell you that the pressure changes from P1 --> P2...

Homework Statement Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer. About x axis. y=sqrt(25-x2) y=0 x=2 x=4 Homework Equations The Attempt at a Solution...

Homework Statement Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line. Sketch the region, the solid, and a typical disk or washer. About x axis. 1) y=1-x2 y=0 Homework Equations The Attempt at a Solution I sketched a curve and a...

Hello, it is often written in books that the solid angle \Omega subtended by an oriented surface patch can be computed with a surface integral: \Omega = \int\int_S \frac{\mathbf{r}\cdot \mathbf{\hat{n}} }{|\mathbf{r}|^3}dS where r is the position vector for the patch dS and n its normal (see...

Can anyone confirm if I have done the following work correctly Find the volume of a solid of revolution obtained by rotating about the y-axis the region bounded by y = the fifth root of x and 2x^2 - 3x + 2. By drawing the graph, I figured out that I need to use the method of cylindrcal...

Homework Statement A solid has a circular base of radius r=4. Find in each case the volume of the solid if all intersection between the solid and a plane perpendicular to a set diameter is: a) A square b) A triangle rectangle isosceles which one of its sides is on the circular base. The...

how to take a PH for solid like cake ...?

Hello everyone, I am an undergraduate student and this year I am going to study Introductory Solid State Physics. My instructor has assigned us book of Charles Kittel. But the book has got terrible reviews on amazon. So I fear purchasing it. However there is an another book by Ashcroft that has...

I took AP Calc BC already and I am entering as a freshman, should i take freshman Calculus again? How many freshman calculus courses actually go through these topics? 1. Hyperbolic integration/derivatives 2. telescoping series 3. Work 4. Fluid Pressure 5. Moments of Inertia 6. Center of Mass...

I have found plenty of study materials, notes and links on Classical Mechanics and Quantum Mechanics. However I could not found any forum on this site that provides study materials of solid state physics. So please if you have got the link, please post it in here.

Perhaps Tensor Calculus holds the answer; but I just can't justify the time for studying that as I know nothing of it. The end objective is to calculate the mass moment of inertia of the yellow solid parallelepiped about rectangular axes through its centre of mass as in the diagram here...

Homework Statement Ali is making solids out of cubes . Each cube has a volume of 27 cm^3. The diagram shows one solid Ali made . It has 10 faces and a volume of 108 cm^3. Ali made a solid out of the cubes that has 9 faces.What is the smallest volume in cm^3 the solid could have? Homework...

hi everyone... i am dong my project designing a 3d solid state hi everyone... i am dong my project designing a 3d solid state accelerometer.The accelerometer should detect and measure steps. Can anyone of you help regarding the design of it...

Dear every body. I have one problem of my homeworks that I can solve. Please help me! Thank you. Construct in k-spaceof the first 4 Brilloun zones of a square lattice in the extended zone scheme & show that the 1st, 2nd, 3rd, 4th Brilloun zones have all the same area. Construct these...

Hi everyone, I am currently studying solid state physics from the book by Kittel(8th ed). But in this book, the chapters are like a summary of each topic and detailed explanations do not exist. While proving a formula, several steps are omitted and just the results are given. For this reason...

Last week I posted the following question here: https://www.physicsforums.com/printthread.php?p=2735375 "Is it possible to predict the color of a solid object based on its molecular formula?" It wasn't completely ignored but the thread did come to an abrupt end after only three...

Hi I am looking for some good solid state physics textbooks. Can anyone who has taken courses in solid state physics direct me to a good introductory book?

Homework Statement The area bounded by y=2 coshx, the x-axis, the y-axis, and the line x=4 is revolved about the x-axis. Find the volume of the solid generated. Homework Equations I sliced the area along the axis of revolution. That is the strip is dx. So the equation necessary is...

In quantum field theory of high energy physics one encounters so called anomalies like e.g. of the kind discussed in this thread: https://www.physicsforums.com/showthread.php?t=406540 As far as I understood, it basicallymeans that the classical theory has a higher symmetry than the qft. Does...

Find the volume of the solid obtained by rotating the region bounded by the given curves about the line y=1. y = \sqrt[4]{x} , y = xI couldn't figure out if a should subtract one from x or from y = \sqrt[4]{x}. I don't know if I'm doing this right I tried subtracting it from x and got a...

Homework Statement A solid insulating sphere of radius R carries a charge per unit volume of p. Use Gauss' law to find an expression for the eletric field on a spherical surface of radius R/2 ie: inside the sphere. Homework Equations Gauss' Law = (Net Flux = Q / Eo) Volume of a Sphere...

I'm looking for a solid material that will diffuse light throughout it. In particular I would need a thin bar with a light source at one end that will diffuse light to all sides of the bar, however, I don't specifically need a bar as long as the material can be machined. I'm trying to search...

This is a fairly simple question so I wasn't sure if it belongs here, but it is not a homework question. Just a question on something I'm reading. The book says there are N solid bodies with initial speed vi (i=1, 2, 3, ..., N) and final speed vi' after some shock to the system. The book then...

Homework Statement Suppose a compound could point in any two directions in the solid and still have the same energy. How many molecules would there be if the total entropy of a solid sample of this compound was 1.181x10^-12 J/K? Homework Equations My plan that failed - S = k*ln(W), where S...

Homework Statement Find the volume of the solid in the first octant bounded by the coordinate planes and the plane 2x+y-4=0 and 8x-4z=0. This is a problem for a practice exam for my calculus course and I just need some help getting started. I have had a lot of trouble in this course...

Homework Statement Homework Equations M = F * D The Attempt at a Solution For a, I need to find the reaction force on the right side. So what I first did was make the sum of the moment on the left equals zero. 0 = M_0 + r_y * L. r_y = \frac{-M_0}{L} I think this is right...

Homework Statement using spherical coordinates find the volume of the solid outside the cone z^2=x^2+y^2 and inside the sphere x^2+y^2+z^2=2 Homework Equations ρ=x+y+z ρ^2=x^2+y^2+z^2 dρdφdθ The Attempt at a Solution im lost

Find the volume of the solid in the first octant of xyz space, bounded below by the coordinate axes and the unity circle and bounded above by z = 8xy. A) 1/2 B) 1 C) 2 D) 4 E) 8 I know definitely volume will be the double integral of 8xy dy dx. I think my limits of integration for the...

hi guys was doing one of the questions sort of stuck as i don't know much about cantilever beams. I've got this question here: Consider a cantilever beam of length L carrying concentrated masses at both of its mid-lenght and at its tip. the cantilever may be assumed to have negligible mass...

Find the volume of the solid in the first octant of xyz space, bounded below by the coordinate axes and the unit circle and bounded about by z = 8xy A) 1/2 B) 1 C) 2 D) 4 E) 8 I know we need a double integral. The bound below should be the unit circle which would be x^2 + y^2 = 1. So...