Assignment Definition and 341 Threads

Hi ! I've been working about assignments problems and how to solve them. I will have to do a presentation about it in few weeks. However, I'll have to do it in front of 2 judges: one specialized in math and one in physics. Because i don't want the physician to get bored during my...

Homework Statement F=(9.0x10^9Nxm2/C2)(3.2x10^-9C)(9.6x10^-9C)/(0.32m)^2 The x in between the N and m is a multiplication symbol, not a variable. The Attempt at a Solution I'm not asking anyone to solve this for me, I just need a little direction. Thanks in advance.

I'm a programmer but weak on hardware so I'd appreciate your help. In a novel I'm writing there are about one hundred underground cities housing one million people in the US; the rest of our population is dead. Somewhat smaller percentage of survivors in Europe and Asia. We have several years...

Homework Statement This problem is about the 1-dimensional harmonic oscillator. The normalized energy levels are labeled |n>, n=0,1,2... Two operators are given by \widehat{A} = \alpha (\widehat{a}++\widehat{a}-) \widehat{B} = i\beta (\widehat{a}+2+\widehat{a}-2) where \alpha and...

Homework Statement Assign J values for P and R branches of H35cl, H37cl, d35cl, and d37cl compounds. Homework Equations The Attempt at a Solution I have a fundamental IR spectra I did on and HCL/DCL compound. I'm extremely confused how to assign J values. I've been looking online...

Homework Statement Hello all, there are three fairly simple electronics related questions of an assignment to be handed in tomorrow, and whilst the initial answers as obvious, I'd greatly appreciate some assistance on elaborating on certain questions: 1. Explain the reasons for requiring...

Homework Statement A rod of negligible mass is supported by a hinge at the wall by a horizontal wire fastened at a 30 degree angle one-third of the way along the rod. A weight of 12 N hangs from the left end of the rod. a) Find the tension (T) in the horizontal wire. (T = 62.2 N) b) Find...

Hi I am doing a mine engineering degree by correspondence and I have an assignment to do and the lecture notes do not provide any assistance on some of the cals. I am hoping some of you can help me I will start with these two questions and see if you can help before posting more: Q1)...

Hi I am doing a mine engineering degree by correspondence and I have an assignment to do and the lecture notes do not provide any assistance on some of the cals. I am hoping some of you can help me I will start with these two questions and see if you can help before posting more: Q1)...

"Handicapped" pendulum assignment Hello everyone, I was wondering if anyone could help me with an assignment about a "handicapped" pendulum (you got to love the professor's taste for scientific terminology). By "handicapped", it is meant that the pendulum is attached to a stationary point...

I need to get a 100 on this last Physics lab assignment, but I can't get this "rod" ...problem :( Help would be appreciated (a) L1 = (65 cm)/2 = 32.5 cm "CORRECT" (b) [(149 kg)(1) + (149 kg)(65 cm) + (149 kg)(65 cm + 32.5 cm)] / (3)(149 kg) = (149 + 9685 + 14527.5) / (447) =...

Homework Statement an airplane, whose air speed is 580km/h, is supposed to fly in a straight path 38N of E. But a steady 72km/h wind is blowing from the north. In what direction should the plane head? i know the answer is 43.6 N of E but i am not completely sure how to get it Homework...

Homework Statement Hey Everyone! So I have an assignment that says to approximate the integral f(x)=e^(3x), -1<x<3. Answer the following questions Run the code with N=10, N=100, and N=1000. For each approximation, when does the result agree with the exact value of the integral to 4 digits? How...

Hi! I have attached the picture. Can someone please tell me what equation of motion will be? My guess is that it will be \ddot{x} = -k/x -kx/2

Having a little trouble with this latest advanced egg drop assignment. The main assignment has two parts - 1. Create a rocket that can reach a minimum height of 120 ft 2. Create a vehicle that can land with an egg for a passenger, and not have it crack. We also aren't allowed to use...

Hello. I'm a freshman in college and I'm taking an engineering introduction course. Our assignment for this week is to interview an engineer who has a four-year degree in engineering. So I'm coming here for help! Any reply much appreciated! Here are the questions： 1.Which field of mechanical...

Homework Statement In the figure a box of mass m1 1.0kg, on a frictionless inclined surface is connected to another box of mass m2  2.0 kg . The pulley is massless and frictionless. An upward force of magnitude F = 6.0 N acts on m2 , which has a downward acceleration of 5.5 m/s2. What are...

Homework Statement Hi i tried this problem i attached(jpg one) but i don't think i am doing it right as I am getting a really small number and also would how would you calculate the apparent power over dependant source because i don't think i did that right either Homework Equations...

Forces applied to occupants in car crash (important for assignment!) Ok so I'm in grade 10 at school and for my physics assignment I'm comparing the forces applied on the vehicle (or occupants) in a collision, where one car has a crumple zone and the other one doesn't. If they were both...

Homework Statement The average mass of an automobile in the United States is about 1.419 × 106 g. Express this mass in kilograms. Homework Equations The Attempt at a Solution Well I did dimensional analysis doing these exact steps to get the mass in kg: I...

1. The situation Hi, I'm in the UK and just finished my first year of college, and now I need to do a 2000 word academic assignment (on physics) for my college so I can show Unis. I am 17 and a competent, interested young physicist. 2. The problem I am very much interested in physics...

Good morning/evening fellow physics enthusiasts. For my year 12 maths c class, we're doing an assignment on bungee Jumping (Task sheet can be found by googling "maths c bungee jumping" first link will be the relative one (pdf file)). For this assignment, the first question asks you to find...

Question 2: -------------------- Homework Statement Consider the following sets, where U represents a universal set : U = {1, 2, 3, 4, ∅, {1}} A = {1, 3} B = {{1}, 1} C = {2 , 4} D = { ∅ , 1, 2 } Homework Equations A+D is the set : (Choose only one ) 1. {1, 3}...

Question 1 : -------------------- Homework Statement Consider the following sets, where U represents a universal set : U = {1, 2, 3, 4, ∅, {1}} A = {1, 3} B = {{1}, 1} C = {2 , 4} D = { ∅ , 1, 2 } Homework Equations Choose the correct option : D - B is the set ...

i have typed and attached my question and my attempt here with. I am sure I know what I am doing but its a last part I am not sure about so any help would be great. Thanks

I've been given a school assignment that if I were to, hypothetically, gets a story published on an engineering success story, what publication would I choose and why? Although this is a pretend situation, my professor will take no hesitation to fail the assignment if I am unable to provide a...

Question About Assignment -- accelerations, velocities and distances Homework Statement Q1. Homework Equations Q1.What will be the distance traveled by each buses since t=0s? Q2. Explain how it is possible for 1.a body to undergo acceleration even though it is momentarily at rest...

Homework Statement Hey physicists. I have a problem. My assignment this term for physics is to test the efficiency of an electrical appliance, and to make suggestions on how to improve the efficiency for the future. I conducted a number of experiments on the kettle, using 2 different kettles...

Homework Statement Well I have written my entire program for my assignment, but I cannot get it to compile without multiple instances of the same error: "expected primary-expression before ']' token. Can anybody see a mistake I am making? I would greatly appreciate your help, thank you...

It’s a 12 page assignment completely based on C++ simulation. I got the result and then I describe the results according to my numerical analysis while I was describing the result four of the sentences exactly match with Wikipedia. During coding in C++, I did not copy a single line from...

Homework Statement (see attached files) basically, I have to solve a puzzle game simulated by matlab. In a school of n students with n lockers, each student opens and closes a locker they walk by. all the lockers start the game closed. the first student changes every locker's status...

Hi guys having a problem with my code, FORTRAN keeps stating: lambda(k+1)=(newsum/oldsum) Error: Incomparable ranks 0 at and 1 in assignment. The code is below: subroutine powerit(a,b,c,E,n) implicit none real, intent(in) :: E real, intent(inout) ...

I have a an array of type complex. I am trying to assign a value to it in a loop, but I get a strange error "Unclassifiable statement at (1)". I really don't understand why. do t = 1, count real(in(t)) = cos(2 * pi * f0 * t) aimag(in(t))=sin(2 * pi * f0 * t) end do thanks.

I have used 9 out of 10 tries and there is only 1 try left! Anyone knows what I am doing wrong?

Homework Statement (see attached file) Homework Equations (see attached file) The Attempt at a Solution isbn=input('Enter 9 Letter ISBN number: ','s'); for i=1:1:length(isbn) (%indent)num=str2num(cat); (%indent)check=num*i %somewhere in...

Hey guys. First time posting on here. Hope I don't step on any toes with this post; not to familiar with how things work around here. Basically, I'm super frustrated with this programming assignment I've been given. Been working for about 4-5 hours in between classes and can't seem to...

I have 100 on every assignment/test in my DE course. Today, I took one quiz out of many (of which 2 are dropped) on using Laplace transforms to solve equations. I have done dozens of these problems, with great success. Today, the quiz was 2 problems, both of which relied heavily on the fact...

i don't understand these equations and can't find a way to do them from my textbook or any websites please help.. (a) √(2^2+2 x 2+1) (b) -√(〖25〗^2-) 〖24〗^2 (c) (7x +y)^2 - (7x - y)^2

Homework Statement Prove that Prove that the equation has at least one positive real root, using the Intermediate Value Theorem on an appropriate function. 3 arctan(2x-1)=cos^2(x-(∏/6)) + 1 Homework Equations No clueThe Attempt at a Solution I honestly speaking have no clue how to even...

Homework Statement Ok so we have been given a diagram of a cathoe ray tube, with relevant data on it. The second question asks to "calculate the speed of the electron, using data from the first question". I need to make sure the answer is correct as it leads into many different questions...

Homework Statement Hi, teachers I have been doing some work but I am confused. Have you ever heard of this great math website www.wolframalpha.com (Google for maths). This is one questions I done differantiate 3e^-4tsin(5t) and here is the link for the answers from...

Have an urgent assignment... I have a urgent assignment please if there is anyway you can skype or chat with me to help pm me right away. I really need the help..

Hi physics forums, this post may seem like it has lots of questions, but don't think that you are doing ''my homework for me,'' it's actually a huge assignment, in which I am only going to ask a few questions about. this question is actualy easy (or seems to be), but i keep getting 64/3...

Homework Statement What weight of O2 in grams will be required to react with exactly 100 grams of NH3 ascending to the eq. NH3+O2--->NO+H2O Homework Equations I think none. The Attempt at a Solution I don't have any attempt on this problem because my brother only ask for my...

fortran77 statement -- character assignment Hi, I am porting an application written in fortran 77 to linux. The following code compiles well with IBM xlf compiler on AIX. However, when I use g77, it fails with the following error:foo.f:6: + var /ZFF/...

Hi! I'm a bit stuck with this special relativity assignment, here's is the problem: So the problem here is that not only does the hole shrink in S', as stated in the problem description, the pole should also be wider by a factor of 3 in this frame. So we have an 18 ft wide pole that has to...

Homework Statement Firstly I'm sorry to bother all of you that will find this question really basic but I haven't studied Maths since GCSE 7 years ago and I am now doing a degree in Engineering without A Level Maths so any help would be great...I need to work out the algebra and the main...

Hi all, Although my homework assignment centers around practicing multi-threading type stuff (by implementing a ring buffer), my question is more centered on trying to figure something out that has nothing to do with multi-threading but nevertheless has me stumped on the assignment itself...

1. Show that the angle between two position vectors is equal to the angle between two instantaneous velocity vectors eg. v1 and v2 when v1 and v2 are conncected tail to tail in a uniform circle. No angles are given, it is just general. 2. Has to be proven without calculus. No information...

Homework Statement 265 students hire a tutor to help them improve their scores on the SAT test. The results are summarized in Math and Verbal score changes. Math: Mean change in score = 19, Standard Deviation of score changes = 65 Verbal: Mean change in score = 7, Standard Deviation of...