What is Hello: Definition and 271 Discussions

I am interested in finding logical answers for complex biochemical issues that have baffled Professors and I would like to say a big hello to everyone 8-)

I have a private pond and want to reduce the number of crappie. I took a model 57 hold 'm electric fence controller and via inverter connected it to a 12v deep cycle battery. I tested it at home in a 1 gallon mason jar of water with two "hot" leads in water and the ground to a cabinet hinge and...

hello i am just a kid attempting to learn as much as i can about subatomic particles including quantum physics.

Hello, I'm Rose. I'm studying in Master Physics. I want to know many things in physics, but It will impossible without asking someone for many thing that I don't know yet. That's why I join this Physics Forums. I am glad to be a member of this forum. Thanks from Indonesia.

I really love physics but I am a simple amateur. Hope you all will be patient with me. Good luck.

I'm Kyle and I'm an AP Physics C: Mechanics student. Today I learned that I need a 5 on the AP exam to get credit for PHYS131 at the school I want to go to, so I need to pick up the pace. I've gotten great grades in the course since this year started, but I'm nowhere near a 5 level. I'm hoping...

Hey guys. First I would like to say, I am joining this forum simply to discuss theoretical design. I know the basics when it comes to physics however if you see me post anything, its typically off the top of my head from a world of imagination. I've always been one for theory, and making it...

Hey everyone, i just thought i would introduce my self, my name is *removed* I live and study in rural Australia. I am currently studying a bachelor of Civil Engineering and aspire to pursue a matsters in structural engineering. I joined these forums to improve my mathematic skills, seek...

Hello there, I'm here to learn and discuss on various and random topics of Physics. Mostly Quantum Physics and Relativity.

Hi everybody I'm happy to be part of Physics Forums

This is my "Hello Thread". Hi scientists, I hope we could work and help us each other. Happy new year! See you soon...

Hello world. I am Nüradh, I prefer to keep anonymous, but I'll explain a little bit I am Nüradh, I'm 20 years old and I currently study at high school, I have physics as my major subject. I've recently begun the second half of my time in high school, which brought about a lot more physics...

Hey, I'm an adult who finally realized that physics is great and tries to recall (or rather learn for the first time) what he learned (or rather was supposed to learn) at the school. I've been reading some basic things around since it's kind of hard to figure out where to start this journey...

Hello there, My name is Sara and I have an electrical engineering degree from an American university and a physics degree in the field of nanophysics from a United Kingdom university. I would like to move to the field of astronomy and astrophysics. I joined this forum to learn, share...

Homework Statement Would it be possible for someone to look over the parts of my lab report. If there is anything that I did not mention in the abstract, please inform me. I wasn't sure how I should end the paragraph. My teacher wants us to write our opinion on the success of the experiment...

I am currently a grade 10th student stuying in Germany. I was never interested in science subjects such as Math, Physics or Chemistry, until I heard about Einstein's theories and the book " A brief history of time" by Stephen Hawking. Now I have a totally different view about those subjects I...

I need help. I don't know what to do. Every time I see a crackpot posting on PF I'm going into an ecstatic state of utmost glee. I gobble up the convoluted effusions as if they were celestial ambrosia. I wallow in the pungent fragrance of confused and misapplied terminology. I feel my soul...

1. Here is the equation http://i.imgur.com/EKdWnws.png 2. The attempt at a solution The first part I've done correctly. So here's my thought process: To get the period I used T=2 * pi * sqrt(r3 /GM_E) T=5521s W(angular velocity)=2pi/T W=1.138*10-3 rad/s V=WR where r is 6754000m...

I need to detect wool and linen on the same dress, i don't want to cut peace of the dress and check it, and i have to check a lot of dresses in a short time. please help me :confused: thanks

PLz find the attached image. Each link weight is given. the 50 kg weight with link rotates about the red hinge point. angle is as shown. please help me out its urgent. need to calculate the torque about the red hinge point.

Hi! I'm new here and seek some puzzles for my mind.

Hi there, I am George and I found physics and chemistry very interesting. I would like to meet similar oriented people to advice me to start a new hobby!

Are there any books or website where I can see how to connect arduino and labview together?

hello! I'm new here, looking forward to make new friends This is my first post! I just finished my high school and now I'm going to join an undergrad physics program I have interest in research and I've even read the article written by a PF member about being a scientist it answered most of...

My Yahoo is changing their site to the point that, after 12+ years, I have decided to leave. After many searches for a replacement, I finally ran across a site called uStart.org that has much of what I had with Yahoo. My concern is that a Google search on uStart returned a lot of hits about it...

Hello, My name is Mark, a non-traditional undergraduate student at Okstate. It's a pleasure to finally join this forum! My question is: where may I post "personal theories"? I thought maybe under "Beyond the standard model" but the rules specifically say no personal theories, but it...

He seems to be a rather grumpy fellow...

Hello everyone :) Been reading your forum for a couple of years as a visitor and decided to take this opportunity to thank everbody for there exceptional intellect and insights. I have been a science fan since a child, but lack the formal education to pursue such vocations. Most of my knowledge...

Holographic BB out of prior BH (stringy version of BH bounce) http://arxiv.org/abs/1309.1487 Out of the White Hole: A Holographic Origin for the Big Bang Razieh Pourhasan, Niayesh Afshordi, Robert B. Mann (Submitted on 5 Sep 2013) While most of the singularities of General Relativity are...

Homework Statement h(x) = f[g(x)] h'(x) = f'[g(x)] * g'(x) Homework Equations h(x) = sin(-x) The Attempt at a Solution So, this one is pretty simple, except I just want to confirm something. When I do it it, it looks like this: The derivative of sin = cos, so you have...

This is not a homework question, I'm not trying to get an answer to solve this problem. I just need to know what this kind of algebra one problem is called. http://www.flickr.com/photos/84652508@N06/8590390983/in/photostream

So could you please help me demonstrate some inequalities? Please! They want to prove them without calculating the integral. 1/3<=integral from 4 to 7 (x−3)/(x+5)dx<=1Thanks!

Homework Statement Homework Equations x(2x^2 - 5) = -1 The Attempt at a Solution This question has been flung at me without any pre-examples how to solve it. I have only dealt with equations like 2x^2 + 5x - 12 = 0. I know that the equation above should be set to zero, but how...

Hi all, My name is Jamie and I am currently living in The United Kingdom. I am a web-developer and work closely together with a designer and together we have always been very interested in physics and theories as well as astronomics and the universe greatest questions! We have not...

Hello. I've a question about transistor IRF-740. This component has a Zener diode connected between drain and source. Has this diode a function of limiting over voltage ?

Hello all! Welcome to the new "not explodypocalypsed" world! Have a seat, take your coat off, and let's get down to the business of discussing SCIENCE!

Hello, good people -- Flagpole rigidity questions Tis about my finals answers :) I just want to know if I'm right or not. I was required to determine features of a flag pole that would enable it to withstand strong winds. Among them are: *String tension of strings attached to the flag pole. I...

My name is Tongyu Chen, and you can call me Creek. I'm a 21 year-old boy in physics and come from China. I am the only child in my family so sometimes I feel a little lonely. I play table tennis, volleyball and basketball. Though I looks not very tall I often get rebounding balls in basketball...

Hello World! :) Who studied Department of Applied Physics,Where you study? ^___^

First of all, just registered, first post. So hi all, just started undergrad course in physics at kent so may pop up here quite a bit :) So, I was just outside, having a smoke, standing in the doorway of the house. Now I've noticed this before and not thought it about as much but the smoke...

My beloved TI-85 died. It had served me quite well for 16 years, and I still think it's one of the very best calculators TI ever put out. But after changing the button battery, for some reason it started to refuse to display anything, eventually reaching the point where it wouldn't even turn on...

Hello, all! I've just registered to the Forum after an extensive search for one that I feel will be conducive to my current and future questions. That being said, I'll tell you a bit of where I currently stand in my education. Unfortunately the realization of the importance that lies within...

Hello, I am being asked to find the magnitude and directional sense and I know how to resolve it but I am having a lot of trouble figuring out the signs. I read somethign about the right hand rule and I know it is suppose to be the easiest way but I just don't get it. could you point me in the...

favorite fish: halibut my name is actually joel. i work as an automotive technician currently. i went to school for it. (huge mistake) i like the wrc, brazillian jiu-jitsu, and dogs. married w/ no kids. wife is currently finishing up her undergrad for physical therapy. i love long walks...

Hello. I just got a PMT the glass bulb of which has been broken. Even if performances are not the best, do you think I can use it as an Electron Multiplier (with all convenient electronics) ?

hello I read about it in a book but I find anything about in the web. How is it formed and how does it behave?

Okay so this is my first post after like 15 min of tying to figure out how to post. Anyways I have been reading about the quantum theory and basically what I took from the research was that quantum mechanics is used for small matter on a atomic level. Well people have a theory (claim) that their...

I need help in solving the two simple task, and I will be very grateful if you helped me. 1)Write a program that prints the textbox: 1 121 12321 1234321 123454321 2) Write a program that brings the input sentence.In this sentence instead of the letter A there is the letter X and...

Hello everyone this is my first post on PhysicsForums I am in my second year of electronic systems engineering degree and I have to choose a final year project. I am really enjoying the modules on RF engineering and electromagnetics, especially electromagnetics is just too interesting I...

hello, i found a patent in the internet where a device is presented in which a body is surrounded by water (especially if you scroll down on the 12th and 13th page in the document). www.google.com/patents/US7353554.pdf the author claims that the body is floating inside the device...