Hard Definition and 1000 Threads

I hope everyone could understand my matrix notation! T: M22 -----> M22; T[a b; c d] = [a+b b+c; c+d d+a] I found the the basis for ker(T) to be [1 -1; 1 -1] im having problems finding a basis for im(T)? I know that it has to be dim3! so far i have: im(T) = {[a+b b+c; c+d d+a]/ [a b...

hello everyone can anyone give me any tips on recognizing compressions and expansions of functions? ie. vertical expansion, horizontal compression

Given an n*n crossword puzzle grid composed of n^2 boxes (black and white), consider the problem of determining the size of the biggest square composed entirely of black boxes that can be created by first rearranging the rows and then the columns. Determine the smallest k such that O(n^k) is...

HI GUYS i just have some hard problems on partial differentiation... hope you guys can help out 1. find "day z / day y" its the funny backwards 6 symbols instead of the normal differntiation symbole if z=4y^3 * sqrt(x) - ln(4xy^3) + 2x i did this: i diffenriated 4y^3 * sqrt(x) with...

How do I correctly differentiate this using implicit differentiation: xy^1/2 = 1 + x^2y I got to here before I started wondering how I would properly isolate y': ((1/2xy)^-1/2)y + y'x = 2xy + x^2y' How far off the beaten path...

I have soluted these so but I need an explanation of what I've done. An even 2,23m long plank is turn-able around its one end. The plank is hold up in an horisontial way with a vertical upp-force on 268 N The force works at 1,52 from the turn-able point. Decide the planks mass. What I did...

A competition-cyclist closing the goal. Towards the end-rush she raises her speed from 12m/s to 20m/s on 6.5s. The Cyclist and the cycles masses are together 70kg. Calculate acceleration The accleration is 1,23 no problem i calculated that but the next question is hard. The Cyclist pushes...

The point is to find currents i1,2,3,4, and 5 in the picture. R1 = 14 Ohms R2 = 6 Ohms This is my work so far. 5 Currents, 5 Loops, 5 Equations, that is the rule (or so I think) The way I am looking at it, there are 6 Loops, so if someone could reduce it to 5 that'd be of some help...

Ok, here is the prob. You are arguing over a cell phone while trailing an unmarked police cruiser by 25m; both you and the cruiser are traveling at 110km/h. Your argument diverts your attention from the police cruiser for 2.0s (long enough to look at the phone and yell "I won't do that!"). At...

Any ideas from our very astute members on getting more women involved in math and science? Think of all the brain power we are missing out on? Would it take a dramatic change in culture? I guess I am taking a fairly egocentric view here, since I am only familiar with the US. Are their any...

I'm working on writing some hard science fiction stuff, and I have a question I was hoping you guys could help me with. See, my training is primarily in math and chemistry, and it's been quite some time since I've really had any dealings with more than just the most basic concepts in general...

Well... for me. A Basketball Star covers 2.80m horizontally in a jump to dunk the ball. His motion through space can be modeled as that of a particle at a point called his center of mass. His center of mass is at elevation 1.02 m when he leaves the floor. It reaches a maximun height of 1.85...

I was wondering how u solve this kinematics question: a banana peel is dropped from rest down a shaft. 6.2 s later the sound of the banana hitting the ground is heard. how deep is the shaft i think: v1= 0m/s a=9.8m/s^2 i'm reallu stuck on this one.. don't know where to go from here.

Two space ships (F and M) start at point x=x'=0 and t=t'=0. F stays put while M takes off in the x direction at 0.6c. After 350 min on F's clock, M turns around and heads back (assuming instantly). 350 more min on F's clock and M is back at start. T = 700 min. calculate time t' that has...

Hard Vector Question Much Help Needed! Points A and B are any two points on a cirlce with a center O. The heads of Vectors OA and OB lie on the circle. Vector OC is the sum of OA and OB . In the Diagram, the head of OC lies outside the circle. Explain your answer to each question. a.)Is it...

I have three laptops which no longer work. I want to take the hard drives out of them and make external hard drives for my new laptop. What do I need to do? I have no idea where to even start.

Care to venture ideas? i need some...

*It is often held that punishment under pure (hard?) determinism is irrational as the criminal had "no free choice" NoT to commit a crime, and cannot thus be held responsible. Of course, I will have to cite my sources for this statement (no doubt about it!), but moving on... But, why must...

With the development of scientific techniques, archaeology has become more than digging for artifacts and buried communities. It seems to have become a broader field sometimes generalized as prehistory. An argument a historian friend of mine and I have had is over the importance of prehistory...

Projectory: Super Hard Apparently From The Military! Gah Hard hey all i got a very difficult question, apparently some guy from the military working with projectory wrote this and below is the questions and i could not do sections 7 & 8 at all below i have posted my answers not sure if theya...

State space system model derivation - hard and really need help fast - PLEASE! Hi, Just found this site (a little too late I fear!). I have an assignment due tomorrow and I can not solve the last part of it. We are able to source information from anywhere to complete the assignment and you...

State space system model - hard and really need help fast - PLEASE! Hi, Just found this site (a little too late I fear!). I have an assignment due tomorrow and I can not solve the last part of it. We are able to source information from anywhere to complete the assignment and you guys are my...

hi all got some problems with vectors so waswondering if anyone can check what I've done is correct thanks question1. find the vector component of 2i+j-k in the direction of i-3j+2k basically i use the rule a=(v*w^)*w^ w^= i-3j+2k / sqrt(14) thus v=2i+j-k therefore a=(2i+j-k)*(...

My daughter is a bit distressed, she got a call yesterday from a friend to tell her that a girl they knew had just stabbed her mother to death. My daughter's best friend had been the girl's debate mentor last year. She was a nice, intelligent girl, but was known to do drugs and party hard...

Boolean Algebra Hard! hey all, got stuck on some boolean algebra just wondering if you all can check my working out thanks :) basically the ` represent bar's and in the example no. 1 the p is barred, r is barred,and the overall function is barred hope you get the gist of things thanks 1...

I am trying to reformat my hdd when something weird happened. I have a P4 desktop and I wanted to reinstall everything on there. So I booted from the windows CD and it formatted and installed windows XP sp1... when the computer restarted, it said that some file was missing and it wouldn't start...

This one's not too hard...A 1.30kg toaster is not plugged in. The coeffficient of static friction b/t the toaster and horizontal countertop is .350. To make the toaster start moving, you carelessly pull on its electric cord. a) for the cord tension to be as small as possible, you should pull...

I purchased my father a computer that had windows 2000 on it. He wanted me to upgrade it to xp, so I purchased a windows xp oem disk from new egg. I installed it on the computer. I thought that it would simple upgrade to xp, but now windows xp and 2000 are on his computer simultaniously! When...

Is it possible to magnetize steel (hard magnetic material) with an ac source?

I found an old hard drive in a suitcase. It belonged to my old Compaq computer. It is seven years old. Quamtun Bigfoot 6.5 Gb. It was the main hard drive in that computer. I tried to install it in my new Compaa, which is also a Pressario, but only a year old. It is in the second ide drive as...

Our Morning Prayer :biggrin: Our Hard Drive Which art internal Volume C by name; Thy code be clean, Thy fonts be seen On screen as they are on paper. Give us this day our documents, And lead us not into fragmentation But deliver us our data. For thine is the SCSI, And the EISA...

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!