Class Definition and 942 Threads

If I am given a frequency table, but instead of set scores, i am given classes, or a range of scores. So for example: 20-29 | 11 30-39 | 12 40-49 | 2 etc. If asked to find the median of the set of data, should i give the midpoint of the class containing the median score, or should i...

Ok, so I am spose to build a robot for physics class as the last project. Me and my friends thought we should build a RC car with an LED heart on the top. THe problem is we are in need of direction. Does anybody know what is needed and what needs to be done to build a small RC car? If so please...

Our class has only completed ~50% of the Physics B Curriculum! We have done everything except the following: Fluid Mechanics and Thermal Physics, Waves and Optics, and Atomic and Nuclear Physics. We are currently working on Waves and Sound and will probably only be done with optics before the...

They keep mentioning RSS feeds in my class (we've just started learning XML) but have never really explained what they are and why they are useful/interesting/cool/whatever. Could someone tell me a little bit about them and suggest where I might go to look at one? Thanks.

There is a lot of fear and worry on here about colleges, grad school, work, career prospects. If you aim to be, and are, in the top handful of students in every class and exam you take, there should never be any worries. Anxiety and lack of career prospects come when you are not good enough, or...

my question is what it means to get a first class honours in britain? is it that your average will stand above 95 percent, above 90 percent? what does it mean?

Hi, I have to do a lot of integration questions for my astoronomy class but I'm not really sure how to! for example how do u integrate from a number let's say a = 0, to a = 1/(1+z)... and dt = \frac{da}{H_0 \left(\frac{\Omega_{m,0}}{a} + a^2 \Omega_{\Lambda,0}\right)^{\frac{1}{2}}} I've done...

Ok, I'm having trouble understanding the path-homotopy equivalence class. It's kind of blurry when they apply the operation... [f]*[g] = [f*g] ...where [f] is the path-homotopy equivalence class of f. I can see that an element in [f]*[g] is in [f*g], but not the other way around. For...

I'm currently enrolled in a lab class about circuits. we are doing diodes, transistors, op-amps these days. the thing is, I've never taken any circuit analysis before, but the prof. expects us to be able to understand op-amp, diodes, transistors... and be able to calculate quantities for...

Homework Statement Hi guys, I solved this problem out. I'm just curious as to see if my work is valid. I strongly believe it is, but perhaps you can help me. I do have a quick question... once I've found all the voltages at specific nodes, I_o is the difference of the voltage / resistance...

C++ container class help Hi, I'm working on a templated container class called "bag" and running into some trouble. This my header file, bagTemplate.h #ifndef BAGTEMPLATE_H #define BAGTEMPLATE_H template <typename T> class bag { public: bag(int num=10); // construct a bag to hold...

Hi. I am working on an assignment writing the implementation for a class of playing cards. http://www.pic.ucla.edu/~nathan/cgi-bin/moin.cgi/la1#head-111d7fc9df65f327018fa94234ab0b23c0857e98 Here is the header file that we were provided. //filename card.h #ifndef CARD_H #define CARD_H...

Hey all! I'm new here. I actually joined for physics help a couple of days ago, but I found the answer by searching through old threads and didn't have to post a new one. So here's my first post. :smile: Anyway, so I procrastinated on my homework, and now I'm having trouble with it and no...

I want to audit a class in relativity at my school. The relativity professor's name is Dr. Wolfgang Rindler. I am aware that he is writer of many books. However, I don't have a chance to get a hold with his work. Have anyone had any experience with his work? I don't want to interrupt classes by...

1. Careful measurements have been made of Olympic sprinters in the 100 meter dash. A simple but reasonably accurate model is that a sprinter accelerates at 3.8 m/s2 for 3.26 s, then runs at constant velocity to the finish line. (a) What is the race time for a sprinter who follows this model...

Homework Statement Prove that THEIR EXISTS INTEGERS a,b,c NOT ALL 0 AND EACH OF ABSOLUTE VALUE <10^6 SUCH THAT |a + sqrt(2)*b + cuberoot(3)*c| < 10^-11 Homework Equations |a + sqrt(2)*b + cuberoot(3)*c| < 10^-11 The Attempt at a Solution Well, I know that we have to use...

I studied mechanical engineering at UCSD for my sophomore and junior years after transferring in from being a math major at Pomona College (east of LA). One thing I remember is that we talked about the material composition of steel. It has a crystal lattice such that the carbon atoms fill in...

[img=http://img214.imageshack.us/img214/9254/untitledqqag4.th.jpg] it's a question given in the sample exam I think for the first question, there is not much we can do to recover the function x(t), because it gets squared ... for the second part, sampling rate needs to be greater than 2*wm...

Could physicists be considered as metaphysicians who attempt to get to the nature of reality with the help of mathematics? We notice a lot of conflict with the physical intepretation of different theories and even different interpretations about the same theory. I know some physicists might be...

No one in my AP Bio class has an A. Not a single person. The highest we've gotten yet is an 86%, and that's from the girl who studies three hours every day. Is this normal? We're nearing the end of the semester, and yet most of the class has Cs and Ds. It's the teacher's first year teaching AP...

online physics class?? I'm trying to find an online calculus based physics class. Any links would greatly appreciated.

I'm just finishing up a "Classical Thermodynamics" class. Here is a list of topics we covered: Chapter 1: Ideal gas, equipartition of energy, heat and work, heat capacities, rates of processes Chapter 2: Multiplicity of an Einstein solid, of an ideal gas, of interacting systems Chapter 3...

I need some advice for where to start my project which is about Photonics band gaps. I need to write a 10 pages paper on this subject. I am sure I will be asked a lot about the subject which won't even be in my paper so I need to learn about it as much as I can. But,unfortunatelly I don't know...

Hello, I've been fooling around with some equations, and I've managed to land a second class constraint (I don't know whether to laugh or cry). Well, I was wondering is there any good introduction to the subject? The problem I have is that I made the conjugate momentum a function of...

I've been a lurker for a longtime (and recently made an account). That aside, I've just started my sophomore level classes in electrical engineering this year (in college obviously), and my instructor has asked us at the last minute to make a simple project involving an RLC network (so...

Hi there, I have a Physics Intro class next semester and I know nothing about Physics. Is there a book, website, video...anything! that can help me prepare for this Physics course? I want to do well in it and I am willing to learn it. Any suggestions?

My lecturer is currently addressing modern physics. "we" (more like "he") solved the schrodinger equation for hydrogen, and then into all the quantized angular momentum, intrinsic momentum... now we are into quantum statistics... Seriously, I have absolutely no idea what my professor is...

HI guys! well! i have got a question with me. Some forumlae i know and some i dont! please help me in solving it. There is a single stage class A amplifier which has Vcc =20V Vceq = 10V Icq = 600 mA RL = 16ohms Ip=300mA. We have to find: 1) DC Input Power 2) DC Power Loss in...

Hello everyone. I was wondering if this is normal to have class averages this low. This professor seems like he's out to fail everyone. We just got back our mid-term and the class average was a 56%, and 34% of the students 77 of them got a 40% or lower on the exam. I managed to pull off a...

I like the Magnetix kits that are available in stores nowadays, and I'm trying to think of a way that I can use them in a 9th grade physical science class. Mindlessly playing and exploring with magnets is nice for a few minutes, but I'm looking for ideas to have mind-engaging lesson that will...

I have a class III laser that I'm doing experiments with. The laser makes a point on a wall. I am staring at this point for extended periods of time. I could potentially star at this point for upwards of 10 minutes at very close range(less than 12 inches). I can't really discern weather or...

Stuck calculating the class group of a cubic I'm trying to calculate the class group of f=x^3-5x-5. I know that the ring of integers (O_K) is generated by {1,alpha,alpha^2} where alpha is a root of f, and I've found the factorization of 2*O_K, and 3*O_K (the minkowski bound is 3). 2*O_K=<2>...

A few of weeks ago after a dance class I got a really sore hamstring. I thought it was nothing. But three weeks later it is still sore. Have I pulled my hamstring? I don't know how I could have done it (I am very flexible from yoga and pilates and didn't do that much the night I hurt it) How...

During my calculus class yesterday we were learning about the simpler way of determining derivatives, but before that we were discussing arcs and parabolas and the such and eventually about if you fired a bullet up from the ground to the top of the empire state building and it had the correct...

So my teacher is making us write a paper on various games he proposed to us. This is the one I choose. You get 5 random cards from a standard deck. You place 4 of them in any order you like face up, and the last one face down. Knowing your strategy of placing the first four cards, someone...

I had a curious thought while writing a simple program that involved writing my own vector class (as in a mathematical representation of a displacement in n-dimensional space). I was wondering which way would be best to design the vector class ( language is C++ ). The first method was to...

IU-Purdue Offering "UFO" Class http://www.14wfie.com/Global/story.asp?S=5484305&nav=3w6o This is interesting http://www.clevelandufo.com/UFOeducators/home.html

...this might happen to you! :mad: http://youtube.com/watch?v=hut3VRL5XRE

Hello, I have to do a project for my political science course. It should be in the area of "design, implementation, and analysis of survey data; design, development, and analysis of voting technology." The professor said that he preferred that the projects that had quantitative data and...

1)Wiley Coyote is chasing the roadrunner yet again. While running down the road, they come to a deep gorge, 15 m straight across and 78 m deep. The roadrunner launches itself across the gorge at a launch angle of 12 degrees above the horizontal, and lands with 2.4 m to spare. The acceleration...

Q1. If j = square root of - 1 what is square root of j ? what I did was : Plug in the value of j in square root of j and came up with -1 to the power of 0.25. Is this right. Looks like this wrong. Q2. Given a complex number w = x + jy, the complex congugate of w is defined in...

I'm planning on going to grad school for soft condensed matter/biological physics. I'm generally interested in learning as much math as possible, but being a senior, I don't have much time.. I was hoping to hear some opinions/advises about which of the following courses would be most...

In Q[t], define the equivalence relation ~ as f(t) ~ g(t) precisely when f(t) - g(t) is a multiple of t^2 - 5. We define the addition and multiplication of equivalence classes as [f(t)] + [g(t)] = [f(t) + g(t)] and [f(t)] * [g(t)] = [f(t) * g(t)] (Assume: ~ is an equivalence relation...

"Polarized America" & "Class War Politics" As he often does, Paul Krugman hits home with poignant issue - economic disparity in America, and the politics which supports it - even thrives upon it. "Class War Politics" by Paul Krugman, NY Times, June 19, 2006 The poor don't have money, so...

Ok..tried to help a friend understand some of his homework..I haven't seen symbolic logic since college, but there was this one problem in particular that went something like..."Mr. X got a C on his final." and "Mr. X passed the class"...we say that these are represented by p and q...

I question the educational value of such an exam. We've been working out of Jackson this year, and based upon my experience the typical jackson problem (just one) takes at least two hours, even if you know what you're doing and make minimal mistakes (ie dropping signs, forgetting terms in your...

Since senior year of HS is wrapping up, my AP physics class is having a party tomorrow and I don't know what to bring. I could bring cookies, but that seems a little plain. Does anyone have any ideas?

Hi. I just started learning special relativity in my physics class. The prblem is i don't get this point. My teacher said that 2 inertial frames (A and B) where A moves with speed v relatively to B. He says that two flashes of light F1 and F2 occur when the 2 frames are at the same position...

My electronic class is almost over, <thank god>. Unfortunately, I have what I call a "barnes n' noble" book. You know when you walk into barnes n noble and you go to the science section and you see a bunch of math/physics/engineering books. You always pick one up to see what's inside, but you...

we were given this topic about soft drinks. The question is: Ideally, soft drinks are bottled under high pressures and are stored in a refrigerator in a closed container. Explain why these conditions ensure the best (i.e. least flat) beverage. Write an equilbrium equation in your answer...