Hi Definition and 264 Threads

HI TO ALL, THIS IS SAIRA, I AM NEW HERE. I AM REALLY WORRIED AS I HAVE A PHYSICS ASSIGNMENT AND I AM REALLY STRUGGLING BECAUSE I MISSED a lot OF LESSONS BECAUSE I WAS ILL. COULD SOME1 PLZ HELP ME WITH THESE PROBLEMS, I WILL BE EVER SO GRATEFUL! 1. A boy throws a stone from the edge of a...

A Fe (57) atom is in an excited state 14.4 keV above the ground state. The nucleus decays to the ground state with the emission of a gamm ray. What's the recoil speed of the nucleus? I'm not sure how to set this up. I thought a photon would have no mass, therefor no momentum. If so I...

Hello everyone ! I've just joined this forum.I am a university physics student.Just wanted to drop in and say a big HI ! to everyone !

Hi all, I am a nwebie for this forum... Let me start with some goqd sense! Try to answer this simple question without thinking much okay? A father and a son are traveling in a car unfortunately the met with an accident. Father died on that spot but the son was carried to the hospital...

I'm new here so i just thought I'd say hi. It's a bit scary 'cos you all seem to be from America and I'm a Brit born and bred. :biggrin: I'm sure you are all very nice people though! Luv vix :wink:

Hi, I'm sorry if this is a really dumb question... how do you compute 10E4.2 on the calculator? thanks in advance.. cseet

Hey, just joined the site, actually just found out about it! I'm glad I did, I haven't read about physics since college! I miss it, does that make me weird? Probably not here right? Anway, I fly EA-6B Prowlers for the Marine Corps as the ECMO(navigator and Electronic Countermeasures Officer)...

i wish i could find a solution for that poblem it is about inverse function: Show that the function has an inverse function, and find [(d/dx)f^-1(x))] x=a for the given number a f(x)=e^3x + 2e^x - 5 , x>=0 , a=-2 Here i proved that the function has an inverse by finding...

I have this assignment to do and I am stuck on finding the force of friction acting on a curling rock. The mass is 19Kg and the acceleration is -0.2m/s^2 I calculated the force applied using F = ma This gave me -3.8N I let negative rep force applied positive rep force of...

If False the same as Not true? Undoubtendly, this is a question in Quantum Mechanics which was why I put it up here and not a Philosophical Question though it may sound like one... Sridhar

Hello everyone, just wanted to stop by and say Hi. Seems like a very nice place here, did sign up a last year but account got deleted somehow so yeah... Anyway, chances are that I'll be starting thread asking for explinations on the many aspects of Physics that I do not understand. Been...

Hi, I'm in AP Calculus and I feel really stupid :( I feel really stupid because it's only the first week of school and I'm struggling with the review (I forgot a lot over the summer) I'm posed with these two problems (in addition to many other but I don't want to bore you all :))...

Hi, i just stumbled across this site while looking for a helium neon laser. Anyways, I'm not sure if this forum is the right place to introduce myself but ill give it a shot. Let's see, I'm most interested in sound, optics and high voltage toys, heh. Well I'm sure i'll be posting here with some...

I'm new to the forum here; so I might say hi here.. I have a great interest in Science; and am highly ambitious; althoug I am a bit indolent in body, seeing that I never exercise. ^^ May I ask this question; and could you all also give some essential information to a newbie on these forums...