Multiple Definition and 1000 Threads

hello everybody... how to easy find mean with multiple data with simple formula [shortcut formula]? please, see my picture.. thanks in advance... susanto3311

Homework Statement a)[/B] For the following circuit, if Vrms= 40V, write the current and the voltage equations. http://www.imageupload.co.uk/images/2015/02/26/Captureaa814.png b) For the following circuit, if i=0.8 sin(1000t-30), write the voltage equation and determine the average value of...

Throughout my limited physics career (high school, first year university) I was introduced to concepts such as potential energy, kinetic energy, and work. Naturally, I was taught about potential energy using the whole gravity analogy. A brick at height h has more potential energy than a brick...

Below is a test problem I recently had in Probability class. I missed points on this problem (event B) because I counted 0 as a multiple of 3. But...0 is a multiple of 3 right? I approached my professor with this concern and he told me that 0 is definately not a multiple of 3... If I am...

Homework Statement Find the acceleration of both blocks Homework Equations Dynamics The Attempt at a Solution Everything in black is given in the problem. The red/blue is my work. First I want to relate the acceleration of block A to block B by finding the constraint equations: Lrope = 2L1...

Hello Right now I'm going through Feynmans lectures and sometimes the equations really get tons of substitutions so you must look back at where something fits a lot. So my question: is there some software in which you can input multiple (simple) equations and place them around like a "mind...

Homework Statement Compute all the currents labeled using the mesh loop method. Homework Equations Parallel Resistors 1/Rt=1/R1+1/R2...+1/Ri Series Resistors R1+R2...+Ri The Attempt at a Solution My attempt at the kvl and kcl analysis, I think I did this wrong because I can't solve for...

Homework Statement http://www.sumoware.com/images/temp/xziltxnrjlckqjqs.png Two blocks ( A and B ) are linked by rope through three identical pulleys C, D, and E. Pulley C and E are in stationary, while D is pulled down so its constant velocity 1 m/s If vA = 4m/s when A goes down 2 m...

Homework Statement I am stuck on this problem: So the question is asking for F21, F12, F32, and F23. (That's the force by 2 on 1). The mass of m2 is variable. There are four cases where I need to solve for the forces: when m2 has mass of 3kg, 0.3kg, 0.03kg, and 0kg. The mass of m1 = 2.5kg, the...

Obviously if a magnet falls down a conducting tube, it induces a current in the tube. But what if you surrounded the tube with other identical tubes in parallel with the first one so that they're touching, and then wrapped wire around those other tubes? Would the current induced in the wrapped...

please point out the flaws/add to my reasoning here: it is known that energy is quantized, but could that be for just the 3 dimensions we're able to experience? Is it illogically to propose that energy might not be quantized when looking at all of the dimensions together? this could explain...

Based on what I have learned, I know that a theoretical physicist has to work in a specific field. But can one work in two? For instance, a person who has a PhD in cosmology but is working on both cosmology and field theories (quantum, unified). Or maybe even the same person working at a...

In a high energy physics experiment, do you ever scatter more than 2 particles at a time? Suppose you scatter 4 incoming particles and get 4 outgoing particles. Do you only look at connected diagrams with 8 external lines? Or do you also have to take into account the product of disconnected...

I am interested in theoretical (what if) possibility of our Earth having more than one moon, I wonder if they can be arranged at the same orbital resonance as the Galilean moons 1:2:4 If yes, would such system be stable? If yes, should our Moon be the first, second or third satellite out of the...

Homework Statement http://i.imgur.com/VYPECuW.png?1 (f1: f2: f3: f1*f2: f1*f3: f2*f3: f1*f2*f3: is what's written near tables) I need to minimize the functions (sum of minterms: f1 0, 1, 2, 4, 5, 11, 15; f2 0, 2, 4, 13, 15; f3 0, 1, 3, 4, 5, 7, 13, 15) using K-tables... This is what they show...

I'm currently a master student in the field of physics, so indeed it's not in US instead in Europe. Now I'm approaching the end of my master studies and planning to go to a PhD program. I have found more than one destinations (which exclude my own current university) which seem to suit my...

Homework Statement So this is not really a 'solve this problem' question, but, rather, I am trying to understand how they can call ABCDEFA a 'closed loop' even though there is another connection (BE) inside it, and why the equations work. Keeping in mind that I am still in high school...

Hey, i was doing a multiple choice question and i got 0.83/1 on it... There were 6 options to choose from and you could choose as many as you liked. I only picked one of the options. I'm confused as to how or what equation is used to calculate what mark you will get on each multiple choice...

In my quantum mechanical studies, I came across the information that if you know an electron's spin on one axis, then you can not know its spin on another axis. For example, if you know that an electron is spin up on the z-axis, then apparently due to the Uncertainty Principle, you can not know...

Hello, concerning power supplies. I am at the stage where all the components are ready except for the batteries. The thing is, not all the components have the same voltage. My first thought was using a high voltage battery connected to a custom made Power Distribution Board which splits and...

I recently came across a problem that said 'prove that the difference of x^3+y and y^3+x is a always a multiple of 6, given that x and y are integers'. I tried it, but I'm not sure if this is a valid proof. this is with the first triangular number being 0 and Tsubn being the nth triangular number.

I understand that 4% of the light is reflected back from the glass surface in a thick glass mirror. But why 4%? Why not 5% or 10%? Will this percentage change if the glass has a lower refractive index?

I have a question about equation 10.21 in "Exact Space-times in Einstein's General Relativity" by Griffiths and Podolski. The equation is the well know standard metric for multiple extreme Reissner Nordstrom black holes. It has the below term: (1+ sigma(mi/ri)) The point ri = 0 is of course...

Why do high end camera modules have so many glass lenses, apart from the necessary lenses for focus and zoom why is it that in cameras like DSLR cameras there are so many low power lenses where a few high power ones would work do the same job, do the lenses diffract light differently when...

I am looking at air system that is under a constant pressure of 350 mbar into a pipe that has 40 - 2 mm round holes. Is there a formula that I can use to calculate the total volume of air nm3/hr that will escape the system? Let's just say the air temp is constant. Can anyone help with this?

im going through previous assignments to study for a test and i can't seem to remember how i did this one. Add each element in origList with the corresponding value in offsetAmount. Print each sum followed by a space. Ex: If origList = {40, 50, 60, 70} and offsetAmount = {5, 7, 3, 0}, print...

I heard that a website is made up of multiple web pages and I know how to make a web page in Notepad++ with the languages HTML and CSS but how do I create multiple web pages?

when taking double or triple integrals, do you get the same solution no matter which variable you integrate with respect to first?

My tutor asked us today to consider the partition function of the following model as an aside to our topic at the moment. I went to work out the maths of it today and I'm quite stuck for how the calculation can proceed. It's a 1d closed chain with some number, n, points. Each point has some...

Hello, this is a question regarding planar physics. Suppose we have multiple bodies. We can ignore their individual shape and angular speed. So every body is represented by it's position, mass and moment of inertia about it's center of mass. Now my question is, how to calculate the moment of...

Homework Statement An m1 = 7.6 kg block and an m2 = 10.7 kg block, connected by a rope that passes over a frictionless peg, slide on frictionless incline. Find acceleration of boxes and tension of the rope. Homework Equations F=ma I'm not sure what else The Attempt at a Solution I'm really...

Hello experts, Is it possible to run several instances of Ansys Mechanical in Windows or Linux in parallel? How? I need to dramatically speed up the solution of a large list of Ansys Mechanical jobs, typically more than 50000. Such analyses are performed by some script that runs each job in...

Homework Statement A thin film of glass is in flush contact with a thin film of transparent plastic that has a higher index of refraction than the glass. Monochromatic light of a certain frequency is shown on both sides of this combination, and there is very little light reflected from either...

Hi! I am looking for a very rigorous book on some of the topics covered in Calculus of Multiple Variables. My University uses the last part of Adams "Calculus: a complete course" and I found the presentation therein more fit for people needing to know enough to perform the calculations than for...

Q.In the arrangement shown in fig. the ends P and Q of an inextensible string move downwards with uniform speed u. Pulleys A and B are fixed. The mass M moves upwards with a speed. ANSWER PROVIDED BY MY TEXT In the diagram ##vcos\theta=u## therefore ##v=u/cos\theta## HOW I TRIED TO DO THE...

Any1 can explain in an easy way?I know is something to do with the facts that row operations do not change the determinant of a matrix and also determinant of A=determinant of A transpose.But just dk how to prove in full sentence. Appreciate any1 help.

Consider the following java code int a=1; if (a != 0) { int a=3; } System.out.print(a); What is the output A. 0 B. 1 C. 3 D. No output. A compilation error occurs The answer is B. I want to ask why the output shown will not be 3. As the 1 is not equal to 0, should the ' int a '...

So if you have two masses connected by a massless string in a multiple pulley system as shown below, the acceleration will be different right? I ask because when doing normal pulley problems where two masses are connected by a single thread, you assume the acceleration is equal, though the net...

Dear Readers, I'm facing a pretty interesting challenge, which is: "How to connect multiple smartphone mic's in the quickest and simplest way?" Here is a use case. I go into a meeting with a group of random (strangers) that all have smartphones, Android, iOS, Windows. Now I want to record this...

Hey guys! This is my first post, so hopefully it is in the correct spot. I'm a grade 12 student in Canada. I am thinking of majoring in computer science because I love logic and technology. I plan on taking some physics electives because I enjoy physics, more specifically modern physics...

Homework Statement Integrate: (sin(2x))^3(cos2x)^2dx Homework Equations Using substitution Cos2x= (1-(sinx)^2) The Attempt at a Solution I sub u= sin2x But then got nowhere because I had cos2x to the power of 2 and I don't know how to compensate for it with du. [/B]

Hey everyone. I want to extract numerical data from files let's say g0001.txt to g0060.txt and store it in a matrix with each element is an array. like this: M=[g1() g2() g3() ...g60()] matrix order can be 1 x 60 , i.e. to say 1 row and 60 columns and each element is an array...

Hi, I would like to ask you If you could help me with a (I guess quite simple) problem I have to solve. To put it into context: I want to program a helicopter for a videogame with a physical model. So the player controlls throttle, pitch, ... and the game calculates the correct response...

Homework Statement I want to demonstrate that the numbers that are multiple of a and b at the same time, are the multiples of ab. Let a be 2 and b be 3. In the middle of the proof i get to a point that i have to prove that if 3*k2 is multiple of 2 then k2 is multiple of 2.Homework Equations...

I am curious if an alternating solenoid coil needs to be wound with a single piece of wire from end to end, or - can each loop in the solenoid be made of a separate wire and stacked on top of the previous, as long as each termination is connected to the proper + / - terminal. Essentially - is...

Everyone learns the picture associated with e.g. the Balmer series in Hydrogen: a photon with a precise energy flies in and is absorbed by an electron which is excited into a higher energy state, which then decays to the ground state, re-radiating a photon of that precise frequency. If we...

The Multiple universes hypothesis states that there are infinite number of universes, collectively known as the "multiverse". If a person is about to travel back in time, he will create his own parallel universe upon arrival in the past. So if he kills "his" grandfather, a paradox would not...

Homework Statement A man sails 30 km from a port P to a lighthouse Q on a bearing of 128 Degrees. Then he sails another 25 km to R on a bearing of 295°. Calculate the distance of PR. Homework Equations N/A The Attempt at a Solution Well , actually I solved all of the problems before this...

Homework Statement A point charge +q is placed near a curved, charged, insulating rod as shown at the left below. (I'll just draw it, I don't have access to a camera at the moment) The charge is placed near the center of the curvature of the curved rod. For each of the five cases A-E, the...

During my studies I failed to understand thermonynamics and compared the whole subject to black magic. This frustrated me a lot. Years later I tried to restudy it by myself reading sources with less conventional approaches. I had finally come to believe I could make sense of it. But re-reading...