Hard Definition and 1000 Threads

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...

This problem sounds like a homework problem but its not and it is really hard. Consider a rail tank wagon filled with liquid, say water. Suppose that at some moment t=0 there opens a nozzle at left side of the tank at the bottom. The water jet from the nozzle is directed vertikally down...

Please help. I need this answered by tomorrow morning. The question is: Compute the average temperature over the Earth's surface given the fact that the Earth is a sphere with radius a=p. The temperature model is given by the linear transformation T=2(deg)+85sin(φ), with a 90deg rotation...

I'm having a hard time visualising how the units of torque are measured. I can picture how quick m/s or RPM is. But when it comes to torque, I cannot picture what 'x' amount of N/m does. Example, for a motor with 3.3 Lb-Inch or 7N/cm. Does it move 3.3lb of weight per inch? Does that mean...

I often hear people talk about string theory being the hardest branch of theoretical physics, and require a PhD to even understand the basics. I've even heard of people saying it's getting too hard for humans, much like quantum mechanics is too hard for cats. So to put things into perspective...

So I'm struggling trying to grasp the concept of momentum..due to my physics teacher going WAAAAAAAY too fast && i asked for help he didn't help much at all :\..so i asked my previous physics teacher i had before transferring classes because the school " said so " but it was a bit still...

I turned on my computer this morning and it said my computer couldn't start and it began a startup repair thing. The startup repair thing didn't find any problems and it shut down my computer. I turned my computer back on and it started up normally. Is this an indication my hard drive is...

Homework Statement see attached :) Homework Equations The Attempt at a Solution Not sure how to start..! Any hints? Thanks!

Word problem Derivative of Distance formula... Super hard. Please help. Homework Statement A point P is moving along the cruve whose equation is y=√x. Suppose that x is increasing at the rate of 40 units/s when x=3. How fast is the distance between p and the point (2,0) changing\ at that...

Homework Statement the easier one Atwood's Machine. The masses are M and 2M, and the pulley is a uniform disk of mass M and radius R. the string is massless and does not slip with respect to the pulley. Find the acceleration of the masses. Use force and Torque. answer should be something...

"Fake hard" aggrevation, and an appeal for advice. I love math. And logic. And modeling things. Outside of class, I even love physics. Inside of class, I feel like someone playing Street Fighter for the first time against someone who has owned the game for a year. Every time I get a...

Once i finish my undergrad in Australia, how hard would it be to take the masters course at cambridge, the mathematics part 3 tripos? Furthermore, how hard would it be to graduate with distinction? This is of course assuming i am good enough at math and physics to graduate first at my...

Draw a picture showing four identical shapes where each shape has at least one border with the other three. Your picture should be a single two-dimensional shape containing no gaps or holes. Tried many shape combinations irregular and regular. We got given a hint of not to think or draw...

What is Energy? - Hard energy definitions Explain this definition: energy is the ability to impart vis viva (mv2) Is it a well definition? Here's a more complex definition: energy is that measure of the physical change of a system that is conserved as a result of temporal displacement...

pls give me the detail notes for what is Hard water and softwater, Method to remove of Hardness,,,,,,,Hlep me

Homework Statement A pool in the shape of a rectangle is ten (10) m wide and twenty five (25) m long. The depth of the pool water x meters from the shallow part/end of the pool is 1 + (x^2)/175 meters. Write a definite integral that yields the volume of water in the rectangular pool...

I am planning to take my first grad course next semester in statistics (analysis of variance) and am debating if I should take grad combinatorial optimization as well. I handled 4 upper div. courses this semester pretty well (ODE, real analysis, probability theory, advanced linear algebra) but...

Homework Statement Two plane disks, each of radius 5cm, are mounted coaxially with their adjacent surfaces 1mm apart. They are in a chamber containing gas at STP (viscostiy of gas = 2.1 x 10^-5 Ns/m^2) and are free to rotate about the common acis. One of them rotates with angular velocity of...

Homework Statement Suppose that each day I either catch the bus to work or drive my car to work. Suppose that the probability I catch the bus on any particular day only depends on the mode of transport I used on the previous day, and is 0.7 if I caught the bus on the previous day and 0.25...

QUESTION HAS BEEN SOLVED ! :) THANKS MARK! Homework Statement Shark Inc. has determined that demand for its newest netbook model is given by https://webwork.elearning.ubc.ca/webwork2_files/tmp/equations/80/fa9842dd3479ee1baaab655e02a1c41.png, where q is the number of netbooks Shark can sell...

Homework Statement A person drives a car (without negative lift) over the top of a hill, the corss section of which can be approximated by a circle of radius 250m. What is the greatest speed at which he can drive without the car leaving the road at the top of the hill? Homework Equations...

[PLAIN]http://img811.imageshack.us/img811/4882/stumped.png So from the above question I presume that the relation (Density)x(Area1)x(Velocity1)=(Density)x(Area2)x(Velocity2), cannot be applied due to the flow being unsteady and thus the control volume changing with time. I've read up about...

Homework Statement a) given, a + 5 and 2a-1, one is 40% greater than the other one, solve for a. b) given, 5x^{4} + 4x^{3} + 3x^{2} + Px + Q. When divided by x^{2} - 1, you get a remainder of 0, solve for p and q. c) given csc(6b + \frac{pi}{8}) = sec(2b - \frac{pi}{8}), solve for b...

I think this is Poisson's Equation (and inhomogenous). I think I need to use Green's Identity. Let \mathcal{R} be a bounded region in \mathbb{R}^3, and suppose p(x) > 0 on \mathcal{R}. (i) If u is a solution of \bigtriangledown^2 u = p(x) u \ \ x \in \mathcal{R} \ \...

1. Suppose a piece of solid bismuth weighing 27.7 g at a temperature of 253 °C is placed in 277 g of liquid bismuth at a temperature of 333 °C. Calculate the temperature after thermal equilibrium is reached, assuming no heat loss to the surroundings. The enthalpy of fusion of solid bismuth is...

integrate zdz/sqrt{z^3-1} I have been doing it for 1week. please help me

1 hard(?!) Biology Question!HELP! :/ Homework Statement If life had been "intelligently" design, and if an important design principle is conservation of material and efficiency of process, we would not expect DNA replication to involve the crazy, complex, intricate, Byzantine mechanism for...

Imagine the following scenario: There is a hollow steel cube. I cut the top facet off so that I get a box with a lid and then polish both cut surfaces so that geometry fits almost perfectly (no gaps are larger than 1/100 of a milimeter or so - or even smaller). Then I close the box and...

I am a high school senior having a problem with a problem in my thermochem class. Could someone please help me understand the following: if 16.8 kJ are released when 1.20 g of F sub 2 (F2) reacts with SiHsub4 (SiH4), what is the heat of reaction when 1.90 moles of Fsub2 react?

Homework Statement A horizontal slingshot consists of two light, identical springs (with spring constants of 57 N/m) and a light cup that holds a 1-kg stone. Each spring has an equilibrium length l0 = 47 cm. When the springs are in equilibrium, they line up vertically. Suppose that the cup...

I post it in the image

[PLAIN]http://img839.imageshack.us/img839/2670/hardlimitproblem.jpg I am having trouble showing this. I figured I would divide both sides by a, and show that lim n-> infinity [(a1/a)*b1+...+(an-1/a)*bn-1+(an/a)*bn]/(b1+...+bn) = 1. I can explain in words why I believe this to be true; as n...

I am not sure where to post this thread but i guess here. So not to brag but I have gotten straight A's most of my entire life, I found school pretty easy aside from some spots (like Spanish). My GPA is very high and I am ranked in the top 2 percent of my class. So once I completed spanish 3 i...

12 persons sit around a round table for a game. 1st person gives the ball in his hands to the person in either his left or right randomly. in the same token the person who holds the ball gives it the person in either his left or right randomly. game continues so until the last person holds...