Positive Definition and 963 Threads

Can't figure it out Prove that if n is an odd positive integer, then one of the numbers n+5 or n+7 is divisible by 4 My thoughts I don't know if this is right- Multiply n+5 and n+7, because if one of them is a multiple by 4 then shouldn't their product be divisible 4

Hello! I need a help with one question: Discuss weather any work is being done by each of the following agents, and if so, wether the work is positive of negative. a) a chiken scratching the ground (what I think is that work is performed as W=F∆x, and if the chicken moves her leg back and...

A positive point charge q is placed at x=a and a negative point charge -q is placed at x=-a. a: find the magnitude of the electric field and the direction at x= 0. b: derive an expression for the electric field at points on the x-axis. use results to graph the x-component of the electric field...

when does friction in a car becomes positive? in a dry surface and i na wet surface and on ice.

I was working with Fourier series and I found the following recursive formula for the zeta function: \frac{p \\ \pi^{2p}}{2p+1} + \sum_{k=1}^{p} \frac{(2p)! (-1)^k \pi^{2(p-k)}}{(2(p-k)+1)!} \zeta(2k) = 0 where [itex]\zeta(k)[/tex] is the Riemann zeta function and p is a positive integer. I...

So let's be positive then... What are some of the great qualities in likely 2008 presidential candidates? No smears please. I'll start the ball rolling. John Edwards is working with the Poverty Center in North Carolina. The aim of this center is to "combat poverty in a way that honors...

im always confued about negative and positive signs, soemone give em a easy way to remember is whatever is on the left side of the x-axis egative, and above positive always? also when is friction negative, if the mass if moving up a ramp, is friction always negative, and if its moving down...

Hey, I have this task that may seem simple, but really isn't: When a box moves across a surface the force of friction does a negative work. Can a friction force ever do a positive work? Possibility 1: Yes, because else what is it then that moves your car forward when you accelerates...

Hey folks. I thought i might check my answers and confirm if theyre right or not. the following have to be simplified and expressed with positive indices. Below are the indices; 1. (√a^2b^3)^6 2. (x^a y^-b)^3 (x^3 y^2)^-a 3. (27x^3/8a^-3)^-2/3 4. {4√(x^-2/3 y^1/2)^3)}^-2/3...

Four charges are placed on the corners of a rectangle. What is the resultant force on the positive charge (a = 1.3 m, b = 0.8 m, q = 1.8 × 10-9C)? HELP: Use Coulomb's law and superposition. HELP: Superposition tells us that we can find the force on the positive charge by looking at the...

http://www.nytimes.com/2005/08/23/sports/othersports/23cnd-armstrong.html?hp&ex=1124856000&en=923ead1e210ac91b&ei=5094&partner=homepage

Let (x(n)) and (y(n)) be sequences of positive numbers such that lim(x(n)/y(n)) = 0. If lim(x(n)) = +∞, then lim(y(n)) = +∞ If (y(n)) is bounded, then lim(x(n)) = 0 To me this is self-evident. But HOW can it be proved?

You probably think that adding one to zero gives you one. But, let us examine this process a little closer. Imagine being at absolute negative infinity. I know, you are probably thinking that infinity goes on forever, which indeed it does, and therefore we cannot comprehend the point at...

The U.S. seems caught in a love-hate relationship with the rest of the world. What would you say is our most admirable quality, and what the most detestable?

Hi, I have been reading the paper "Quantum Gravity with a Positive Cosmological Constant" by Lee Smolin (http://arxiv.org/abs/hep-th/0209079), and am having some trouble making the constants in Part I, Sections 2, 3, and 4 match with what I would calculate them to be when I try to go through...

I don't know why there is such hatred against the approval of the dot-xxx domain. Personally I think that it is a great idea because the whole idea of domains is to categorize websites, right? Getting all adult content on this domain is another challenge but it's a good call.

"A positive operator A is defined to be an operator such that for any vector |v>=!0, <v|A|v> is real, non-negative number." Can somebody tell me how can I check if a matrice (for example 4x4) is positive or not? Thanks in advance

I have two quick questions. The first is, if a ball is thrown from a bridge 25 meter above the ground at 49m/s, is the acceleration negative? I thought since it was thrown up, it would be positive, but the book has a similar problem, a ball is thrown upward at a speed of 48ft/s from a cliff...

Hi everyone, This is my first post here :smile: Anyway I have problems solving this question wonder anyone could help give me some clues as to how to go about it. Here goes: The positive integers are bracketed as follows, (1), (2,3), (4,5,6,7), (8,9,10,11,12,13,14,15), ...

I am asked to list the positive rational numbers in one list so that the pattern of the order is clear and so that all the positive rational numbers would eventually appear on the list. Then I have to explain the pattern and why every positive rational number will eventually be on the list...

Suppose there is a positively charged wire inside a negatively charged cylinder. What would be the net external electric field? Would I first need to combine the charges, or can I just combine the separate fields?

fi have no idea what to do and i tried posting it on another forum and nobody replied so please help me! thank you so much! find a positive integer n so that 40n is a fifth power (of an integer) 500n is a sixth power, and 200n is a seventh power, or explain why it is impossible to do so...

For a positive natural number n, we use |n|= \log_{2}n as the measure of the size of n (which is the number of bits in n's binary representation). however, in most cases the size of n can be written as log n without giving an explicit base (the omitting case is the natural base e). Show...

Hi. I am doing an investigation on the effects of different antibiotics on Gram positive and Gram negative bacteria. 1) Can you say that antibiotics and bacteria form a chaotic system? Can a very small change in concentration of antiboitics, or a small variation in pH, change the diameter of...

Do all positive slopes taken from points (x1, y1) and (x2, y2) satisfy the following logic, x1 < x2 and y1 < y2?

this is quite a classic problem i think but I am having difficulty finishing it off. If we have two stamps of positive values a and b, (greater than 1), what values can be expressed as a linear combination of these 2 stamps. If the stamps have a highest common factor greater than 1, then there...

Again , its another case of "dont understand the question" (how the hell am i ever going to get the answer :smile: ) Anway, on with the question (it seems simple...): "By completing the square, show that x^2+2x+5 is positive for all real values of x " I have completed the square, my...

Positive / negative angle help please I just started the trig unit and was learning about positive and negative angles The self exercise says find the corresponding positive angle of -75 degrees. would the answer be 75 degrees? I know that -75 means the angle was made from the terminal...

I am not a physicist nor a mathematician. I am not familiar with Einstein's actual equations so I don't know. This is simply a thought in the form of a question. Photons and electromagnetic waves travel at c. At the speed of light time goes to 0 (zero); also, time is negative in the equations...

How many positive integers less than 500 have exactly 15 positive integer factors? I know the answer, but not sure it. Can you give me the answer ?

Hey Everyone, This is a quick question.. is binding energy positive or negative? I'm pretty confused now, because in some places the definition was: The energy released when the nucleus of an atom is formed by combining neutrons and protons. And in other places: the energy required to...

In this question I let "x1t , x2t, x3t " be the conjugate of x1, x2, x3 The hermitian form Hc(x) = c*x1t*x1 + 2*x2t*x2 - i*x1t*x2 + i*x2t*x1 + x1t*x3 + x3t*x1 +i*x2t*x3 - i*x3t*x2 (sorry, it`s a bit messy) For which value of c is Hc ositive definite? I have tried to find the...

The terms of this series are reciprocals of positive integers whose only prime factors are 2s and 3s: 1+1/2+1/3+1/4+1/6+1/8+1/9+1/12+... Show that this series converges and find its sum. this is my first time writing here. i hope someone can help me with this question.

How many pairs of positive integer a, b are such that a^2 + b^2 = 121?

Find all positive integers c such that it is possible to write c = a/b + b/a with positive integers a and b. Please help me :smile:

There's an old problem concerning an old drunken person who is so sloshed he can't walk properly: he's got a 50/50 chance of stepping a metre forwards; otherwise he moves a metre backwards. It can be shown that he winds up where he started infinitely many times and that his average displacement...

Hello scientists, I'm unable to make any advances with this small problem.. two equal and positive charges (q) travel (in the same direction) at a speed (v), and are parallel to each other, at separation (r). Derive an expression for the force between them, in the form of: F = Felec(1 -...

Does every positive polynomial in two real variables attain its lower bound in the plane?

Should positive and negative charge be termed opposites? Maybe they are merely complimentary and this is why they seek each other and are not opposites?

For the function f(x) = 3sin bx + d where b and d are positive constants, determine an expression for the smallest positive value of x that produces the maximum value of f(x). :confused:

hi i am new to THIS place here but i do put posts on the number theory site as well. i am in need of direction and have no idea where to turn. i need help w/ two ?'s and they are... how many pos int. <1000 are NOT divisible by 12 or 15? prove the if the sum of two consec. int. is a...

Does self interest negate the positive effects of a country's actions? The USA is constantly claimed to be selfish, despite the result of 'selfish' acts being HIGHLY positive for others (The marshall plan is a great example). Currently, it could be argued that we would like to develop oil...

Despite studying chemistry I've never actually been given this information, any explanations/theories that could possibly explain why?

Just curios. Why do the electrical outlets in my home have a positive, negative, and a ground? With circuits that I am familiar with, if you have a positive and a negative connected, there is no need for a ground. Does anyone have an explanation? Pan

A friend of mine told me that (by his teacher) 0 is an even and positive number, how can it be?

Hi Folks Can anybody help me; I am looking for a small electrical circuit to control an output voltage in DC between Zero to 6 volts. The input for the circuit is from a 24-volt commercial vehicle, but my difficulty lies in the fact It comprises of two positive feed wires driving an...

What does it mean when it's said that the positive terminal of a battery is at a higher potential than the negative end? How does electric potential (voltage) relate to electric current/electric fields?

Opposite charge always attract and same charge repel each other. Will proton and electron crash on each other? What will happen if they do so?

Positive solving Zeno’s “Achilles” paradox? How do You find https://www.physicsforums.com/showthread.php?s=&postid=85446#post85446 [?]

I know very little about it, but am interested in installing it on my second computer. So what are positive aspects of using Linux? Why would I want to run it on my computer? Where can I get it to try it out? Is it easy to use? Is the software I use for Windows XP compatible or does it have...