Hard Definition and 1000 Threads

I am trying to integrate from 0 to 8 C (t)e^-rt and C(t) is equal to 50t^1/2 (50 times the square root of t) I was thinking I could use an infinite series method, the one in the form of e to the x, and my x would be -rt. But if I decide to go that route, then what would I do with...

Are live plate tectonics unique?

Start Windows Explorer, right-click the computer's root hard disk, and then click Properties how do I find the computer's root hard disk in order to righ click on it?

Does anyone know if Windows XP Professional has a cap on how much hard drive space it can see? I'm planning on getting a 250 GB hard drive and putting it on there.

Can someone give me a hand with this problem - Its screwing with my head! :frown: The derivative of the function f(x) = \int_{43}^{x^3}\cos(t^2){dt} is:

Who are the greatest hard rockers of all time? A few of my favorites volcalists are: Steven Tyler - Aerosmith Freddy Mercury - Queen Mick Jagger, of course. I think these guys pretty much set the standard.

in my opinion, i find this question really hard. -the volume of a can of concentrated orange juice is represented by the following expression: (8x^3-54x+54)\picm^3 the juice is prepared by emptying the concentrate into a large container and by adding 3 cans of the same volume of water...

If I ever happen to come across anything related to equilibrium, I'm going to have a nervous breakdown...I'm ready to explode.

I have no idea how to do this problem can you guys shed some light? Sqrt[7]^2 == r^2 + r^2 - 2 * r * r * Cos[2 * Pi / 3] Thanks.

hi there guys I am doing a thermal physics question and its hard please help me and point me in the right directions please thanks. question 1 A 50g copper calorimeter contains 250g of water at 20degrees celsius how much steam must be condensed into water if the final temperature is to...

CHEM EQUAtioNS HARD! hi can anybody show me if i am writing these equations right or not thanks Fe3+ + 6H20 -> F2(H20)6 3 + Fe(H20)6 3+ + h20 -> Fe(h20)5(OH) 2+ + H30+ when added HCL Fe(H20)5(OH) 2+ + 4Cl- -> Fe(OH)cl4 2- + 5H20 when added KSCN Fe(OH)cl4 2- + SCN- ->...

Suppose there are 4 people, two of which are wearing red hats, and two of which are wearing blue hats. one person is behind a wall, and the other three are standing in a uniform line, only able to see the person directly in front of them. Which person knows exactly which color hat he's wearing...

Hey, I bought a Western Digital hard drive to put into an enclosure. I have an HP pavilion zv5000 notebook. I have no idea what jumper setting on the hard drive I should use. Should I leave it as cable select, move it to master, or call tech support? The box from the enclosure says...

Hey guys My buddy has a Dell laptop. We are trying to format his hard drive and reinstall Windows. What is the best way to do this? I tried format c: in a dos box, but obviously it wouldn't let that go because Windows was still loaded on top. What do you suggest? Thank you

Can someone help me with this hard problem? Ok... here is a hard problem that I can not figure out!(These are all made up names!) :cry: When King Hagan commissioned Brightvale Castle to be built, he had every worker in Brightvale to help build it, so that it would be done as quickly as...

Can not seem to find the answer. If x^sin y= y^cos x Find dx/dy (pi/4 , pi/4). If someone could help it would be great.

:mad: 1. Given y= (2e^t + 3e^-t ) / (e^t + 2e^-t) find inverse of of the equation from above i did the working out to get y= ([2t-3] / [2-t]) ^ 1/2 do i have to apply any log laws or anything like that? 2. cosh x = 4.5 find sinh x exactly i applied the formula (coshx)^2 -...

A 12 kg object initally has 24 joules of kinetic energy. How far will the object move against a net resisting force of 6 Newtons? :rolleyes: (A) 2 m (B) 4 m (C) 12 m (D) 16 m (E) 24 m

y=(x)/((x+2)(x+3)(x+4)). how to do u take the derivative? HELP!

(edited need help) hard integral to me but you? I tried much but i couldn't resolve.. Integral of (1+ln(x))/xln(x) dx thanks =)

:confused: Can anyone help me figure out this very hard math puzzle? :confused: 2 + 2 = 4 4 + 4 = 8 142 + 468 = 621 3762 + 8271 = ? PS. It is very confusing!

Is "Modern Physics" course hard? Is "Modern Physics" course hard? It's a 3 Credit course that deals with special relativity, atomic structure etc. Would it be impossible to study for this on my own to test out of it?

Really Hard Circuit Question- With LINK Hello there! I am doing a really tough physics question on circuits . I am attaching the picture of the circuit so you can actually see what is going on :smile: These are the questions: a) What is the current through R1? This one was...

Hello there! I am doing a really tough physics question on circuits. I am posting link to the picture of the circuit so you can actually see what is going on :smile: These are the questions: a) What is the current through R1? This one was easy I just found the total resistance of...

Is there any material that changes its density so much that you could use it like a clay ball in space but it is hard on earth?

hi guys assistance in this area would be great just see what i have written and comment on them please thanks! all. im thinking about the errors in titration from doing a typical acid-base titration to talk about in my experiment and these are the errors i came up with. First of all my...

hey everyone i got a series of questions so can somebody check my working out and see if they are right thanks. 1. Make t the subject of the formula 1/g= 1/(t+1) - 1/(s-1) i did all the working out and got at the end t= GS-2G-S+1 / S-1+G not sure if i should make it simplier like t= G(S-2)...

Hello all, As I am preparing for my PhD proficiency exam, I tried to solve some Analytical chemistry problems. and stuck in one. Well, I have attempted to solve this, but have not found enough evidence to study on and solve the problem. What I've done is basicly the following: I am in...

Hard Drive Failure?! Save my old computer. :) I have an older computer and it was working just yesterday, and I was just about to use it to do calculations 20 hours a day, but that doesn't look like it will happen. It's a Pentium I - 133Mhz computer, and it runs Windows 95. The current...

The base of a particularly curvy building is described by y=x*sin(3x)+10 with y in feet and x is in tens of feet for 0 \leq x \leq 3\pi. Views are shown in the attached file i uploaded. The cross sections perpendicular to the x-axis and paraell to the y-axis are semi-circular. that was just...

Coordinate Geometry II HARD! 1a). TriangleABC has vertices A(4,6), B(-3,4) and C(-1,-3). Write down the three inequalities whose intersection is the interior of triangleABC. 1b). Prove that triangleABC is a right angled isosceles triangle. 2a). The lines L1 and L2 have the equations...

Does anyone out there have a few minutes to review a problem I worked out ? I need to know where I am making errors and how to correct them If you have a few minuted and are willing to help a fella out please reply ASAP Here goes The problem states to find the following 1...

1).Find the co-ordinates of the point A on the line x= -3 such that the line joining A to B(5,3) is perpendicular to the line 2x+5y =12. 2). Using the vertices A(2a,2b), B(-2c, 0), C(2c,0). (i) prove that the medians of a triangle are concurrent. (a median is a line joining a vertex to a...

Two long, parallel wires hang by 4.00-cm-long cords from a common axis. The wires have a mass per unit length of 1.50×10-2 kg/m and carry the same current in opposite directions. What is the current in each wire if the cords hang at an angle of 6-degrees with the vertical? Basically,,,,,I...

Folks, I'm running Windows XP, but now I need to format my hard drive. The only potential difficulty that I foresee is having to deal with the NTFS partition. I'd like to get rid of it, install Windows ME and then upgrade it back to XP. I've read that the only way to delete any NTFS...

This Austin company may have the future of computing: no more hard drives KXAN.com - Nano Chip Research In Austin http://www.kxan.com/Global/story.as...34&nav=0s3dWBSJ Applied Nanotech Inc. has signed a research and development agreement with Tokyo-based Mitsubishi Heavy Industries Ltd...

Re: first impression Just glanced through the topics here, they all seem interesting, and I'll go through them all in detail later, what the about incredible anomolies awaiting credible investigation? moon some sort of gamma ray or high energy particle interaction maybe? Anasazi, this is...

Hi all, I've been struggling with an idea lately and was wondering if anybody could shed some light on it. It seems simple but i don't think the answer is very obvious. The best guestimate for the age of the universe at the moment is 13.5 billion years old. If we could travel back in...

I love math and physics. The mechanical things that calculus requires to be successful i do with ease. Solving problems in physics is another matter though. I am struggling with the problem solving that physics requires. Physics is definitely not math, math is a tool of physics. I'm solving...

I just got a second hard drive so that i could install FreeBSD and slackware onto it for my computer. (got it because i was out of partitions on the first drive). The first drive is a serial ATA WD drive, the second drive is an IDE WD drive. I just want to set the system up so that it will...

There are four charges, each with a magnitude of 2.0 mC. Two are positive and two are negative. The charges are fixed to the corners of a 0.30-m square, one to a corner, in such a way that the net force on any charge is directed toward the center of the square. Find the magnitude of the net...

Is astronomy hard for very few rewards? I mean can you do anything with a degree with astronomy I think that it's cool and all but isn'nt it the most unpractical of the sciences.

A flowerpot is knocked off a balcony 18.0 m above the sidewalk heading for a man of height 1.85 m standing below. How high from the ground can the flowerpot be after which it would be too late for a shouted warning to reach the man in time? Assume that the man below requires 0.300 s to respond...

The German army in World War I shelled Paris with very large artillery pieces. These so-called 'Paris Guns' were actually a combination of two mortars stuck together. Pointed 55 degrees above the horizon, they fired shells with an initial speed of 1700 meters per second. The guns were first...

Can three people here post one hard physics problem for me to solve??! (That's one person per problem)

what exactly is the hard problem of consciousness? why is it hard?

Find dy/dx by implicit differentiation. (Meaning find the derivative of y.. so y' = ??) cos(x-y)=xe^x Please help and show step by step.. the final answer should be.. y' = 1 + [(e^x)(1+x)]/[sin(x+y)] Thanks a bunch. :smile:

This happened to my dad. When he turns his computer on, it now says "there is no operating system on this hard drive." What could have caused this? If he reinstalls windows, what can he do to ensure that this doesn't happen again?

I'm having a little bit of a problem with an excercise from my QM class. I've got the feeling it's really basic, and it probably comes down to the fact that I'm still quite flabbergasted by angular momentum operators | :rolleyes: . Anyway, the problem: An electron in the hydrogen atom...

hi, a friend is heading over to malaysia in the next few days and asked me if i wanted a 10000rpm ( 8mb cache, SATA ) 74 GB WESTERN DIGITAL 10000RPM hard disk. i would say yes but i am not sure if it will work on my pc my motherboard is an ASUS P4P800SE with Intel 865PE Chipset can someone...