Solid Definition and 1000 Threads

Hello PF :) Homework Statement Consider a system of N electrons at temperature T = 0, each having a mass of m, confined to volume V. Find the number of electrons that: a) have momentum p<p_f/2 b) ... Homework Equations The relevant equations can be derived below: but here is a...

Homework Statement Estimate the volume of the solid whose base is bounded by the graphs of y = x + 3 and y = x2 − 3, and bounded by the surface z=x2+y from above, using the indicated rectangular cross sections taken perpendicular to the x-axis (figure is not the actual graph of the functions...

Hey there, What would you say the prerequisites are for learning Solid State Physics? Both mathematics wise and physics wise. Thank you :)

Homework Statement Rod AB of length 2l, inclined to the horizontal at an angle \phi, falls, without rotating, with some height h on a horizontal table and hits the table surface elastically first left, then right end. During the strike the right end, the rod again consist angle with the...

Hi, Is solid state device physics a must learn subject to design analog circuits. -Devanand T

Here is the question: Here is a link to the question: Calculus ii question!? - Yahoo! Answers I have posted a link there to this topic so the OP can find my response.

Homework Statement Using disks or washers, find the volume of the solid obtained by rotating the region bounded by the curves y = x^2 and y = 4 about the line y = 4 The Attempt at a Solution Since y=4 is parallel to the x-axis i assume i should be using the 'washer' method. The points of...

All I understand clearly that if a metal sphere is charged then the charges must reside on the surface because that is the only way there is no electric field within the metal. However if you imagine a neutral metal sphere, and let's say it is suddenly enclosed by a uniformly charged metal...

1D solid, 0<x<L, with the following boundary conditions: The whole solid is at T = T1 at t=0. x = 0 is held constant at initial temperature T1 for all t. There is a constant flow of heat, dQ/dt out of the solid at x = L. T(0,t) = T1, T(L,0) = T1, How do we go about solving the heat equation...

My choice of solid state Dc circuit breaker is the Mosfet, easily available( i got loads!) i want the mosfet to interrupt the circuit to protect the load from overvoltages This is what I've done so far, please help its not working the way i want it to. note to mods: i also put this...

My choice of solid state Dc circuit breaker is the Mosfet, easily available( i got loads!) i want the mosfet to interrupt the circuit to protect the load from overvoltages This is what I've done so far, please help its not working the way i want it to. the resistor connected to the...

Hi, I am currently struggling in my solid state device class, and i am looking for some links/site that could help me understand more about such. please help! Thank You!

n is the band index and k is the electron wave vector. Now is energy band specified when for each n , k runs through all the values available that specify periodic boundary conditions ? But in Ashcroft Mermin , it is also given that for a given k , there exists an infinite family of solutions...

Homework Statement A 200g cylinder of metallic copper is compressed isothermally and quasi-statically at 290K in a high-pressure cell. A) Find the change in internal energy of the copper when the pressure is increased from 0 to 12kbar. B) How much heat is exchanged with the surrounding fluid...

Homework Statement I have done this problem for the case of a spherical shell, however, I am not understanding how to go about this for a solid sphere. Homework Equations \vec{A} = \frac{1}{4 \pi} \int_{\phi' = 0}^{2 \pi} \int_{-1}^1 \int_0^R \rho_o \Theta(R-r) \sum_{l=0}^\infty...

Like the tittle says.. I am practicing and wanted to make sufre I did it correctly. Forma this excersice the only doubt es en the las parte ( parte 5)... I am not sufre but i think I need to use .005 rather than .05

Homework Statement A nonconducting, solid sphere of radius a is placed at the center of a spherical conducting shell of inner radius b (> a) and outer radius c, as shown in the figure below. A charge +Q is distributed uniformly through the sphere, which thus carries a charge density ρ...

Homework Statement Explain why electrons carry a net energy but not a net current in the case of thermal conduction. Homework Equations n/a The Attempt at a Solution n/a Please help me understand this!

1. Use the integration capabilities of a graphing utility to approximate the surface area of the solid of revolution. (Round your answer to four decimal places.) Function: y = sin(x) Interval: [0, pi/4] revolved about the x-axis 2. Use the area of a surface of revolution...

Homework Statement Region: f(x) = 2 sin x on the interval [0, π]. Find the volume of the 3D solid obtained by rotating this region about the dashed line y = −1. Homework Equations Integration of pi∫(2sin(x) + 1)^2 dx The Attempt at a Solution...

Homework Statement Sodium transforms from bcc to hcp at about T=23K. Assuming that the density remains fixed and the c/a ratio is ideal (1.633), calculate the hcp lattice constant a, given that the lattice constant a'=4.23 Angstrom in the cubic phase Homework Equations I can't find any...

Hi Guys, This may seem like a stupid question but if the Earth gets hotter the closer to the core you get, then why is the inner core apparently solid? Yet the outer core is liquid? They are both (inner/outer cores) made of roughtly the same stuff, and assuming pressure alone is what...

Here is the question: Here is a link to the question: Shell method calculus? - Yahoo! Answers I have posted a link there to this topic so the OP may find my response.

Homework Statement Find the volume of the solid generated by rotating the region bounded by the x-axis, the curve y=3x^4, and the lines x=1 and x= -1. The axis of rotation is the y-axis. Homework Equations Washers method: V=∏∫ [(R)^2 - (r)^2]dr x = (y/3)^(1/4) The Attempt at a...

Can anyone please recommend me a good book on undergraduate level solid state physics preferably with plenty of examples for self study? Thanks.

Suppose I have a region R whose boundary extremely complicated. While it would take me hundreds of years to approximate the boundary with formulae, I can easily estimate the area of R within a desired precision. I want to find the volume of the solid of revolution of R . My intuition told...

Homework Statement Find the volume of the solid that the cylinder r = acosθ cuts out of the sphere of radius a centered at the origin.Homework Equations Cylindrical coordinates: x = rcosθ, y = rsinθ, z=z, r2 = x2+y2, tanθ = y/xThe Attempt at a Solution So I know that the equation for the sphere...

Can anyone explain point 44 of the attached pdf document on surface tension. (Here's the link in case attachment doesn't work: http://www.sakshieducation.com/EAMCET/QR/Physics/Jr%20Phy/12Surface%20tension%20_198-208_.pdf) How is the surface tension direction found out? Also why is...

Im having a discusion reguarding what temperature (celsius) supercooled water needs to be if it was to freeze completely solid. Going from liquid to solid "produces" heat. Therefor it is obvious that the temperature needs to be somewhat below zero. What temperature (celsius) is needed if all...

Here is the question: Here is a link to the original question: Find the volume V of the solid obtained by rotating the region bounded by x=16-(y-3)^2, x+y=7 about the x-axis? - Yahoo! Answers I have posted a link there to this topic so the OP can find my response. First, let's take a look...

Hi, I'm still practicing how to find volume. 1. My problem is this: "Find the volume of the solid described below: The base of the solid is the disk x^2 + y^2 ≤ 4. The cross-sections by planes perpendicular to the y-axis between y=-2 and y=2 are isosceles right triangles with one leg in the...

The file is a PDF, but here is an imgur link, anyone?

Author: Charles Kittel Title: Introduction to Solid State Physics Amazon Link: https://www.amazon.com/dp/047141526X/?tag=pfamazon01-20 Prerequisities: Contents:

Author: Neil W. Ashcrof Title: Solid State Physics Amazon Link: https://www.amazon.com/dp/0030839939/?tag=pfamazon01-20 Prerequisities: Contents:

Homework Statement Use approximations to find the number of free electrons in a 4mm diameter solid sphere of copper. What fraction of its electrons have to be removed to leave a sphere with a charge of +50μC? Note that density of 29_Cu is 8.96 g/cm^3 and molar mass 63.54g/mol Hint: Atomic...

I read that if the cone with apex angle 2α whose central axis is vertical, apex at the origin, then one can use spherical coordinate to calculate the solid angle of the cone ∫02∏∫0αsin\varphid\thetad\varphi However, what if the central axis is align to y-axis horizontally, instead of...

Homework Statement From K&K's 'Intro to Mechanics' Find the shortest possible period of revolution of two identical gravitating solid spheres which are in circular orbit in free space about a point midway between them. Homework Equations The Attempt at a Solution So I figured...

This is only an example from Kraus Antenna 3rd edition page 404. The question is really a math problem involves calculation of ratio of solid angles. Just ignore the antenna part. this is directly from the book: Example 12-1.1 Mars temperature The incremental antenna temperature for the...

i want to compare force on current carrying conductor , 1)placed in air surrounded by magnetic field 2)placed in the cylindrical cavity(without air gap but some electrical insulation) which is placed in magnetic field. please give me practically calculated answers with calculations.

What is the main difference between Solid body and Rigid body ? Can you give me example some of them !

I've never heard it said before but it appears to me that all electrical current that flows in a solid state component system; processors, diodes, transistors, resistors, etc. is eventually dissipated as heat. What are your thoughts about this?

I was watching a video on the internet about charge distributions over solid conductors. The solid conductor was heart shaped which was positively charged. The lecturer in the video said that when you touched this conductor, the charge would distribute itself non-uniformly over the surface of...

So I am given that the gravitational potential of a mass m a distance r away from the center of a spherical shell with mass m' is -Cm'/r for m outside the shell and constant for m inside ths shell. I am to find the potentials inside and outside a solid sphere (the earth) of radius R as well...

Ok, so the formula I know to find weight is W=mg. Why is it that when doing a sum of forces in z they multiply (distance)(mass)(gravity) and not simply sum the gravity force that is mg?

Homework Statement Find the volume of the solid generated by revolving the region bounded by the graphs of y2=4x, the line y=x, about A) x=4 B) y=4 So first I start out by graphing it The intercepts are at 0,0 and 4,4 I use the washers method since there is a gap in between the...

Homework Statement Find the volume of the solid that lies above the cone ϕ=pi/3 and below the sphere ρ=4cosϕ . Homework Equations Find the centroid of the solid in part (a).. The Attempt at a Solution For the volume I got 10pi which I am fairly sure is correct. I attempted trying to...

deciding between 2 grad courses next semester, solid state and stat mech. I've already taken the undergrad versions of both. Got an extremely low grade in solid state the first time, A in stat mech. Currently grad student in condensed matter physics. The solid state class will focus on...

are both of the equations i posted flux equations. one of them is for a surface of a solid and the other is for a curve?

Good morning everyone! I have been presented the following problem: Find the volume of the revolution solid around the $x$ axis of the region between the curves $y=x^2 +1$ and $y=-x^2 +2x +5$ for $0 \leq x \leq 3$. Finding the intersection of the curves yields $x=-1$ and $x=2$. Therefore, I...

Homework Statement panofsky 10.3 Find the torque on a solid conducting cylinder rotating slowly in a uniform magnetic field perpendicular to the axis of the cylinder. The Attempt at a Solution let the radius of cylinder r, and the conductivity is σ, the rotating angular...