Need advice Definition and 230 Threads

can someone advice me on how the graph should look like for a circuit with diodes connected in series? Can we model the diodes this way? Attached picture shows the graphed charecteristic for 1 diode. If its for 3 diodes, how should the graph look like? Am i right to say that Vt will...

Homework Statement Design an op-amp that uses a variable 50k ohm resistor. when this variable resistor is at one extreme, the gain is 13, and at the other extreme, the gain is 3. you may use up to 2 op-amps, and up to 7 resistors (including the variable resistor) The Attempt at a Solution...

I'm about to begin the last semester for my first degree. Somewhere in the first couple of years (I spread it over 5 years as I took time off and worked in the middle) I decided that I would eventually get into the physics program at Toronto. My family did not approve and so I stuck it out...

Hey everybody, I apologize if this is not in the right forum, or if it is not within the scope of this website. I would like to go to grad school in the field of nanotechnology. I'm a physics and math major at the moment, but I'm not entire sure which field of physics would complement...

Hello Everyone, I would need some advice on what type of down converting analog to digital Converter (ADC) board and an digital to analog converter (DAC) board to use for my digital radiometer. Here are the specs for my ideal boards: Analog to Digital Converter requirements: Single...

Heya's. I'm 21 years old, and nearing completion of a B.Sc (majoring in Statistics and Operations Research at the University of Melbourne) Will finish it next year. I've always loved and somewhat enjoyed maths and physics. I did a B.Sc because I've never had a good idea of what I want to be or...

well I'm currently a student at SFSU, junior standing in college and sophomore standing in the engineering program. i originally wanted to do civil engineering since i heard it's easier because everything is static. but next semester, when i will begin my emphasis (upper division), i need to...

I don't know if this should be posted in the homework section, or here, but I've got a problem with basically my whole lab for E&M intro, (the halliday resnick class). Each lab has consisted of the labee (who is of course just an undergrad) drawing a diagram on the chalk board of a circuit and...

right now i am a freshmen at florida state univeristy and majoring in physics. i know that it is a good school, but i am not sure that this is the right place for me. the school seems to be centered aroud sports. the people seem to be centered around parties. i don't feel that comfortable...

I am currently attending a community college and I have completed 28 units and am taking 6 units right now in the summer. I plan on applying to the UC's but my primary choices are UCLA and Berkeley. Since I plan on being a theoretical physicist and getting a ph.d to study string theory...

Hey everyone! I'm an Electrical Engineering student, just finished up my first year of college, and I need some advice about what to do. I have some extra classes for my next three years, and I have some ideas about what might be good ideas. Here are the five ideas I have of what to do in...

I'm looking to make/buy an RF(radio frequency) to detect and display the level of an incoming RF signal. This is going to be used on a radio controlled vehicle. Any suggestions and info would be greatly appreciated.

I just turned 24 and I'm finishing my last semester for my BS in Astronomy. I will be graduating in May but I will be enrolled in the spring semester to either bring some grades up or take whatever classes I want. My problem is that I can't get into grad school with my grades. My overall...

Currently, I am working on my PhD in Physics (do not have a masters). My background is a BS degree in Computer Science / Mathematics. I have almost all the classes one needs to get an undergraduate physics degree. I am thinking of leaving the program recently since my 28th birthday. I am not...

I'm close to graduating now but I am still not sure what I wanted to be. I've thought of taking optometry but I'm not quite sure about how the procedures are. Like how many years of U and stuff like that. So can anyone give me some informations. Thanks

hi I've just started my a levels and am doing physics (naturally). it is the Edexcel Salters Horners specification and I am getting totally confused by it all. It is new to my school, and we did some practice questions the other day which even my teacher couldn't work out (just to show you the...

I really need some help on deciding what I am going to do as far as a career is concerned. The problem is I am 27 years old, and I'm in a bit of a panic that I'm running out of time. For anyone that is interested and would be willing to give me some pointers, I would really be grateful. I...

Please Help! Need advice! I'm currently an CE major. I've decided to switch over to EE, since it's more math oriented and less programming. The only thing is that I'm not sure if I really am all that interested in electronics. It's like I could do the work, it's easy for me, but I'm not sure...

dont know if this is the right forum, but... For my undergraduate degree I have to take three senior electives of my choice. There are 38 courses in 13 concentration areas, but I only have interest in a handful; -------------------------------------------------------------...

So, we have to build this scale in mechatronics class that weighs things as small as a dime to as large as however we want, but it has to weigh a dime. I came up with this idea that will be constructed with legos: A pully (20 cm radius) will be fixed on a shaft with a cup kindda thing hanging...

Hello, I'm a sophomore in college getting a dual degree in mechanical/aerospace engineering. I pretty much know everything we're doing in classes or everything is really easy so I have a lot of free time on my hands. What do you think I can do that will help me in my future career? I was...

My computer's (750 MHz Dell running Win 2K ) unable to connect to the internet, and has a couple of worms (W32.Swen.A@mm and W32.sdbot.worm.gen) wrecking it. The following are some of the error messages/problems that I've discovered : 1. Windows Task Manger shows two occurances of a process...

I am trying to get into an ivy league school and I'm trying to decide what is the best approach. I eventually would like to receive a phd in Mathematics and teach at the University level. My questions are: 1. What would increase my chances more of getting into an ivy league phd math program...

i am very confused about the direction of my life right now. i want to be a mathematician or a physicist or an economist. the confusion doesn't come from the 3 fields i love, its the fact that i pull off good grades with minimal effort, but i can't ever seem to reach the level i want to...

I have a problem that I need some help on. I have some product that I need to separate by weight Product 1 is 15 grams Product 2 is 22 grams Product 3 is 28 grams Could I use a conveyor to get these 3 items up to 21 MPH, have them shoot off the end on the conveyor, and have them sort...

Hi there everyone, For physics, I have to make a car entirely out of food. And, I'm really not sure how I should proceed. What I did think was that I'd make it out of graham crackers as the body, Fudge Shoppe cookies with the hole in them as the wheels, and Cow Tales as the axles. Now...

after much stress i now have ln(t +1) - t = (-ln399)/4 i am not sure how you would proceed about isolating for t. i have tried using the exponential and other algebraic tactics but it has been to no avail. some sort of suggestion would be much appreciated.

I'm planning to learn a CAS. Can you guys give me advice on what I should choose (Mathematica, Maple, Derive, Matlab, or maybe others)? Thanks a lot.

The Q is: show that the number of partitions of n within Z+ where no summand is divisible by 4 equals the number of partitions of n where no even summand is repeated Here is what I got so far Let the partition where no summand is divisible by 4 be P1(x) Let the partition where no even...

So I've decided to pursue a career in medicine. I've already decided on the school, and it's in-state, so that increases my chances of being accepted. I've always wanted to practice psychiatry, but am also considering neurology, neurosurgery, and some other fields- won't really know until I get...