Thank you Definition and 68 Threads

Homework Statement A cylindrical copper cable carries a current of 1300 A. There is a potential difference of 1.6 10-2 V between two points on the cable that are 0.38 m apart. What is the radius of the cable? I=1300A V=1.6e-2 V l=0.38m rho=1.7e-8(resistivity of copper) r=...

1) Two points in the xy plane have Cartesian coordinates (1.00, -4.00) m and (-5.00, 5.00) m. Determine their polar coordinates @ (-5.00, 5.00) r = ? θ = ? 2) A plane flies from base camp to Lake A, 290 km away in the direction 20.0° north of east. After dropping off supplies it flies...

Homework Statement If a 4x4 matrix A with rows v1, v2, v3 and v4 has determinant detA =-2 then then det (v1, 9v2+5v3, 5v2+8v3, v4) =___? Homework Equations The Attempt at a Solution Ok, so I think it should be -18 (since 9 x -2). I mean the determinant should not change...

PLEEASE HELP! I AM LOST! Thank you. I have two questions: 1. Electromagnetic waves also can form standing waves. In a standing wave pattern formed from microwaves, the distance between a node and an adjacent antinode is 0.44 cm. What is the microwave frequency. I keep getting the wrong...

I just thought I would take the time to say, [SIZE="6"] "Thank You" to all of those that have served our country and those who currently are. Without them, we would not be able to do a lot of the things we take for granted. They are my heros and I respect them and all they they do, and I just...

[SOLVED] Lens Problem, Help from Anyone! Thank you, I appreciate it very much! Homework Statement An object is placed 30 mm in front of a lens. An image of the object is located 90 mm behind the lens. a) What is the focal length of the lens? b) On an axis (the x-axis) draw the lens at...

I interviewed with a national lab three days ago (in California). I just got an offer today, when they said it would take at least a month to evaluate the candidate. I was in the process of writing my TY notes to the interviewers until I got an e-mail for an offer. So, what exactly do I say in...

Just wanted to take a second and say thank you to all of the people - Astronuc, Doc Al, nrged, and company - that helped me (and others) along on hairy questions, with issues of clarification, and so forth. I took my physics I final this afternoon and am under the impression that the latter...

Just want to say Thank you! Hello, I just wanted to say thank you to all the people that have been helping me over the past couple of days. I just had Math Midterm today and all of your work with me really paid off as I went in with a much greater understanding of the concepts and theories...

Quantum Phys Questions PLEASE HELP THANK YOU! DeBroglie postulated that the relationship lambda=h/p is valid for relativistic particles. The Planck's constant is 6.63x10-34 Js. What is the deBroglie wavelength for a relativisitc electron whose kinetic energy is 6.77 MeV? Answer in units of m...

Hey Everybody, I just wanted to say thanks to all who have helped me out over the past year or two when I've had math and physics questions. I've now finished all of the math and physics requirements for medical laboratory science as I wrote my calc final today (I just hope I did good)...

May 3 is National Teacher Day in the United States. Even though I am not in school any more, I consider myself a lifelong learner, so I would like to thank all of the teachers, in our public schools, our universities, and on these forums, who are helping all of us to learn...

calculus -.. find dy/dt...thank you..:( can someone please help me out with this question...i did it all sorts of way,quotient rule, product rule..etc.. but i can never match the answer in the book..i just want to know if u did.. find dy/dt = x^2 Tanx / sec x The answer in the book was...

Hi, I need a theory regarding STOMATAL OPENING that involves Potassium. The old theory involves Photosynthesis, but can anyone help me and show me the 2nd theory? Thanks o:)

Have any links to robot research? Here's mine. http://polypedal.berkeley.edu/ http://www.berkeley.edu/news/media/releases/2002/06/fearing/fearing.html http://web.mit.edu/towtank/www/projects.html http://www.gtri.gatech.edu/atas/teams/proj_entomopter.html...

I am trying to learn ways of saying "hello", "good-bye" and "thank you". in as many languages as possible. So far this is what I've got: 1.) English: Hello Good-bye Thank you 2.) Amharic: Selam Ciao Amesegenalow (meaning...

It turns out that I have been fighting just this problem with an older industrial computer [industrial automation stuff]. Due to my lack of familiarity with this particular processor, I couldn’t be sure if I had configuration problems or some other software induced problems. I just observed a...

I was playing in the front yard with my daughter one day and a car pulled up, grabbed my 2 year old and took off. The kidnappers were my in-laws, so its not quite as bad as it seems. I wasn't named on my daughter's birth certificate, so my only LEGAL course of action is to go through the courts...