Hard Definition and 1000 Threads

I have 2 P.C.s as follows P.C.1 : 865G/GVM3-V (MS -7101 V2.0) M-ATX MicroStar Motherboard Pentium 4 Dual Core Processor 80 GB WD Hard Disk 1.5 Gb/s 512 MB DDR1 RAM 250 Watt Power Supply Bought in 2006 P.C.2 : M2N68-AM SE2 ASUS Motherboard ATHALON...

I'm taking calculus for scientists and engineers and was wondering how much harder are upper division courses like partial differential equations, ordinary differential equations, and complex analysis than calculus?

Is it really so difficult to get a position as an assistant professor then crawl up the ranks? Is there anyone here who has done it and succeeded? Anyone who has tried and failed? Are there any statistics on the matter?

I will have a B.S. in Applied physics with a minor in Computation. Graduating in one week. I have been applying to jobs left and right and haven't gotten one call back. It has been very discouraging. I have been applying to Lockheed, Ball, Nasa, Northrop and Grumman... Besides the...

Homework Statement lim n->infinity (4^x + 7^x)^(1/x) Homework Equations Not applicable (?) The Attempt at a Solution Tried taking "plugging" infinity for n but I keep getting 1, is this right? Seems too easy to be just 1? Thank you.

Homework Statement the integral is x*tanh(sinh^-1(2gx/c))) Homework Equations n/a The Attempt at a Solution I cannot figure out how to integrate this! Even Maple can't do it :( Any help would be greatly appreciated! Thank you!

Homework Statement tanh{[(2 *g*t)/(c)]+[(2*g*exp(-rt))/(r*c)]-[(2*)/(r*c)]} in terms of t Homework Equations when I plug into maple I get -(1/4)*c*ln(tanh(2*g*(t+1/r(e^(-rt))-1/r)/c)-1)/g-(1/4)*c*ln(tanh(2*g*(t+1/r(e^(-rt))-1/r)/c)+1)/g The Attempt at a Solution This cannot be...

Do you guys ever get this tingly feeling in your brain after you spend a long time trying to figure out how to solve a problem (eg mathematical proof) and finally getting it?

\int \frac{\cos^2 x}{(1+\epsilon\cos x)^3}\,dx Where, \epsilon > 0 is a real number constant.

Hi, I'm just graduate high school and i'll be in college in the next 2 months, I choosed Mechatronics engineering, anyway, I've been thinking about enroll MIT at Master degree, i wonder that how hard do i have to work to made it. DO i have to spend my every single minute with the subject...

Homework Statement The spring in the figure has a spring constant of 1300 N/m . It is compressed 13.0cm , then launches a 200g block. The horizontal surface is frictionless, but the block's coefficient of kinetic friction on the incline is 0.180. What distance does the block sail through...

I know these kind of topics suck but I'd like some opinions on the schedule I'm planning next fall. I heard EM was hard and I was curious to see if that plus all the rest was a lot to handle. Especially as my first real EE semester Circuit analysis II Introduction to Digital Systems...

Homework Statement A computer hard drive disk with a diameter of 3.5 inches rotates at 7200 rpm. The “read head” is positioned exactly halfway from the axis of rotation to the outer edge of the disk. What is the tangential speed in m/s of a point on the disk under the read head...

HI, sorry about the english can you help me with this question? box initially contains 10 black balls and 10 white balls. The following experiment is repeated indefinitely 20 times : A ball is drawn from the box; if the ball is black it is put back in the box, otherwise it is left out. what...

Java problem ArrayList problem, **URGENT** hard question Introduction: You are part of a team working on a software system for a mobile phone company. The team is working on the development of the component that will be used for storing text messages. The initial design has a structure using...

I still have a long ways to go but it seems like many of the jobs require a master's degree. Due to some past mistakes, I may not be able to maintain my 3.0 that I currently have all the way through until graduation.

Homework Statement Figure 7-40 shows a cord attached to a cart that can slide along a frictionless horizontal rail aligned along an x axis. The left end of the cord is pulled over a pulley, of negligible mass and friction and at cord height h = 1.6 m, so the cart slides from x1 = 4.0 m to x2...

Problem: A 30-foot ladder rests vertically against a wall. A bug starts at the bottom of the ladder and climbs up at a rate of 3.5 feet per minute. At the same time, the foot of the ladder is being pulled along the ground at a rate of 1.5 feet per minute until the top of the ladder reaches the...

Now, I'm not going to ask anyone to do my assignments. I just want help understanding how to calculate tension so that I can complete my work by myself. I may give examples from my assignments, but I don't want anyone to just work it out and post answers - I want to understand. I'm new to...

Homework Statement f(t)= sin(t), so as expected the period goes from 0 to 2pi. But 2pi to 4 pi is function is ZERO, and then starts up again from 4pi to 6pi, then zero from 6pi to 8pi,etc So basically sin(t) that skips every other period. Homework Equations The Attempt at a...

Homework Statement A car is brought from 100 km/h to 0 km/h in 2 seconds. A student with a mass of 73kg(not wearing a seat belt) flies through the air toward the dashboard which is 0.650m away. He smashes into the dashboard and it takes 0.25 seconds to slow him to the velocity of the car at...

Hard Time Understanding "If A C B, then A U B = B" Homework Statement Understand how "If A \supseteq B, then A U B = B" is possible. Homework Equations None. The Attempt at a Solution Since A U B = B, it can be separated into two cases. That is, 1) A U B \subseteq B 2) B...

I have big problems solving this integration: \int_{-a}^{a}\sqrt{a^2-x^2}e^{i(kx-wt)}dx I did an substitution with: x=a*sin(u) Which gave me: \int_{-{pi}/2}^{{pi}/2}a^2cos^2(u)e^{i(kasin(u)-wt)}du But i don't know if that did it any better, cause i can't figure out how to go on from...

tension or is it to hard to work out with physics ? Hi there, I have posted somthing the same, however new evedence has come up. Some say the force thus tension on the muscles has the same average, let's just say for now the force thus tensions are the same. We are using say the bench press...

Statics...is this problem easy or hard? Yes, I know, easy and hard are relative statements, but I mean easy or hard compared to the other stuff I posted here-- if anyone remembers. Homework Statement A uniform beam, AB, whose length is 2 meters and mass is 10 kg is supported in its tip, A, by...

A mass moving with some initial speed hits a very very long NOT massless spring. Friction is ignored. Will all of the kinetic energy that the mass had become the springs potential energy? And when the spring itself would start to move? To me it smells like a nonelastic collision where all the...

Homework Statement A 360 nm thick oil film floats on the surface of the water. The indices of refraction of the oil and the water are 1.50 and 1.33, respectively. The surface of the oil is illuminated from above at normal incidence with white light. The two wavelengths of light in the 400 nm...

Homework Statement A 360 nm thick oil film floats on the surface of the water. The indices of refraction of the oil and the water are 1.50 and 1.33, respectively. The surface of the oil is illuminated from above at normal incidence with white light. The two wavelengths of light in the 400 nm...

Do most students find it more difficult than analysis and abstract algebra?

hard physics question! help please Homework Statement How do I solve the 2 questions below?: Questions 23 24 A 0.l kilogram block is attached to an initially unstretched spring of force constant k = 40 Newtons per meter as shown above. The block is released from rest at time t = 0. (the...

When choosing my classes, I've always picked the easier class rather than taking the harder just so I can get a higher grade. (For example, I took Calc III last semester rather than Honors Calc III). Do you guys think this is a bad idea? If I want to go to graduate school wouldn't picking the...

How hard is it to study astrophysics?? I am starting uni next year and I was thinking about astrophysics.. So can anyone tell me how hard is it (i know it's diferent from person to person but i was thinking you could take more objective approach to this matter) and do you have to be a "genius"...

I see a hard disk drive (Q:) in my Computer directory but I don't know what it is. I recently reinstalled Windows and everything is fine except for this. I can't access it, it doesn't appear in Disk Management (when I right-click my computer icon and click Manage). Here's a screenshot of what...

Vestibular function is hard for me. Please help! Hello everyone, [PLAIN]http://thalamus.wustl.edu/course/aud9.gif First of all I don't understand the pic. Why is the endolymph moving in opposite direction to the movement of head, shouldn't it move the same way. How is inertia involved in...

Why has it been so hard to combine gravitational forces with that of electrical forces? I'm curious. What are the major underlying problems?

Homework Statement Fe3(Co)x, Fe is 33.26% by mass. Find the value of x. The Attempt at a Solution 167.5425 g / 0.3326 = x ( 58.9326 g) / 0.6628 x = 5.6... but the right answer given was x=12. question...

Just sharing. Oh, http://www.imdb.com/title/tt0425061/" . My goodness! Watch it with your folks.

I barely passed Calculus II, I got 50 in the whole course after finals and I had 56 before finals. The class avg was around a high D but I can't remember exactly now but that's besides the point. Calculus II at my college was integral calculus with some application of integrals(volume, surface...

Homework Statement A popular amusement ride operates as follows: Riders enter the cylindrical structure when its stationary with the floor. They then stand against the wall as the cylinder then begins to rotate. When it is up to speed, the floor is lowered, leaving the riders suspended against...

Homework Statement Consider this matrix as the augmented matrix of a linear system. State in words the next two elementary row operations that should be performed in the process of solving the system \begin{bmatrix} 1 & -4 & 5 & 0 & 7 \\ 0 & 1 & -3 & 0 & 6 \\ 0 & 0 & 1 & 0 & 2 \\...

I'm a reasonably smart person. I have knowledge of 11 languages and I'm a proud studyaholic, meaning I've been studying voluntarily for about 30 hours a week since 2007, and 50 hours a week for the last 4 months. I'm tired of reading popular science physics books which report what scientists...

Back in the end of october, I picked up math as a hobby (although it will also help me career-wise, but in the end I probably won't go into a math related career, unfortunately. Currently my major has nothing to do with math). I had only completed up to calc II for the AP test, and hadn't done...

I was wondering whether it is possible for an engineer with a PhD to learn pure mathematcis in depth to a level that enables him/her to use some ideas or line of thinking from pure mathematics into engineering and vice versa (if the vice versa is actually possible). Or is it completely...

Definition of a "Hard Science" I was reading through some master's program admissions guides and came across this statement twice under the requirements: "An undergraduate degree in engineering, math or hard science from a regionally-accredited university". The first two parts are...

Homework Statement A vector field h is described in cylindrical polar coordinates by ( h equation attached ) where i, j, and k are the unit vectors along the Cartesian axes and (er) is the unit vector (x/r) i+(y/r) j Calculate (1) by surface integral h through the closed surface...

Homework Statement solve 2x = x2 Homework Equations The Attempt at a Solution i have no clue

Find \sqrt{1+\sqrt{1+2\sqrt{1+3\sqrt{1+...}}}}

"Physics is too hard for physicists" What does this quote from Hilbert mean? My Math professor said he can't stand how vectors are used in Physics. Being a first year student, I have no clue what this means yet. All of my friends at school are Math majors and have a certain distaste for...

Homework Statement There are two questions, one being a communicational question while the other an application: 1.Charge A of +2.0 muC is put at the origin of an cartisian plane. Charge B of -4.0 muC is put 40 cm to the right of charge A. Where should charge C be placed (between the two...

I am just finishing up my sophomore year in a Junior College and am getting ready to transfer to a UC. The last few math courses have been very difficult for me. I am usually an A student but am starting to lose motivation because of the difficulty. My Physics courses are very easy, but I am...