Drawing Definition and 559 Threads

Homework Statement Draw free body diagrams: A rectangular block being accelerated on a horizontal, frictionless surface. A skydiver who had just jumped from a plane and hasn't reached terminal velocity. A cube being accelerated up a 30° incline with μk > 0. A pendulum bob that has just been...

Homework Statement There are m different buckets of marbles where each bucket has a different number of colored marbles (m[i]). The total number of marbles is the same in each bucket and is K. There are K individuals who walk past each bucket and pick 1 marble out of each one (so all...

Is their a method for predicting the molecular shape of molecules without drawing the Lewis structure? I am preparing for an ACS exam and would like to try to save some time on these problems. I think I could determine the steric number by counting the total electrons available, and...

Homework Statement Hi all, Is there anyway, meaning by use of equation to determine how we should draw a temperature entropy graph? I understand that is the equation for entropy for ideal gas transformation: \del S = nC_vln(\frac{T_f}{T_i}) + nRln(\frac{V_f}{V_i}) But i don't seem to be...

Homework Statement Sketch the element for the stress state indicated and then draw Mohr's circle. Given: Uniaxial compression, i.e. \sigma_{x} = -p MPa The attempt at a solution Below I have the sketch and a partially complete Mohr's circle...

Homework Statement Im having difficulty drawing a specific graph. I am not entirely sure how to explain my question/ the graph i need to draw so i think the best way is to provide a bit of my code and explain using it the graph using it... the code below gives a read out of the energy...

Homework Statement Hi, I'm having trouble conceptualizing how to draw a Velocity(Or position)-Time Graph where more than One dimension is covered. We haven't really covered this in class, but its giving me trouble. The concept is: Acceleration is negative when changing direction(This was...

Homework Statement Draw each of the following H-bonded structure (a) (HF)2 dimer; (b) (CH3OH)4 cyclic.Homework Equations The Attempt at a Solution I truly don't know where to begin. I started by searching about dimers and found a http://en.wikipedia.org/wiki/Dimer_%28chemistry%29" but that...

http://img268.imageshack.us/img268/9...ingdrawing.jpg How can I tell whether this is third or first angle projection? What is the big line at the top that the red arrow is pointing at? Is an external thread used where the orange arrow is pointing at?

Homework Statement From this diagram (see the attachment) I have to draw the phasor diagram showing the various voltages and current of balanced 3-phase resistive-capacitive load. Homework Equations I know from the capacitive current lead voltage by 90 degree The Attempt at a Solution...

I have been asked to draw the graph of the function f(x)= (x+3)/(x-2) I have found where it cuts the y-axis by putting x=0 but am unsure of how to find the x value. I found the inverse of f(x)= (x+3)/(x-2) which gave me x= (y+3)/(y-2) then set y=0 which again gave me x=-3 I have checked...

Is manual drawing with pencil and paper a good quality an engineer should have at his power? I'm still an undergrad and I understand all drawing is done with CAD packages, but I still enjoy drawing free hand before I put it onto software (I guess because I'm not so good at using CAD) Or am I...

Homework Statement A*certain*soil*has*c’*=*12kPa*and*φ’*=*32°.*The*major*and*minor*principal*stresses*at*a*point*in*this* soil*are*348*and*160*kPa*respectively,*and*the*pore*water*pressure*at*this*point*is*96*kPa.*Draw*...

Homework Statement Bobo decides to go skydiving. When he jumps from the plane, his mass combines with the mass of his chute is 75.4kg, which means that the force of gravity on him is 739N. A. Before he opens the chute, the wind resistance on Bobo gives him an upward force of 10N. Draw a force...

Homework Statement note:I am not 100% positive of the wording of this problem. As it stands, I am not looking to get help on plugging on equations and such. I am looking for help on how to draw the problem. A cargo plane is flying horizontally at a velocity of V meters per second. and...

1. So this is one of my homework problems and I just can't seem to get it, and my attempts are verging on pathetic. I feel like this shouldn't be this hard, maybe I'm just missing something. This is the acceleration vs. time graph...

Homework Statement I want to draw a phase portrait from linearization of a nonlinear differential equation with eigenvalues l1 =1 and l2= -1. With equilibrium in (2,2) x' = y-x y' = (x-1)(y-2) Homework Equations The Attempt at a Solution First I compute the eigenvectors v1 = [0;1] v2 =...

Hey everybody, sorry if I sound like a noob, but I keep emailing my teacher and he doesn't respond, I would really appreciate it if someone could help me understand these types of problems. Thanks! Homework Statement Each of the following vectors is given in terms of its x and y components...

When drawing a Lewis structure for a compound how do you know what bonds to what? For example, with H2SO4, how does one know whether the H bond to O or to S?

Hi all. I am now working on the uniaxial cold drawing on the plastic sheet (polybutylene succinate, a semicrystalline polymer). After uniaxial cold drawing, as expected, strength increased along the drawing direction/ machine direction (MD). Strength and elongation at break drastically...

Hi Pretty simple, just what the title says, anyone know of some good drawing software for Mechanical Engineering? What I mean by drawing software is software that can make diagrams such as MOHr Strain Diags, Beam Diags, and Freebody drawings, etc.? Thanks

Homework Statement See figure Homework Equations The Attempt at a Solution Just to give the readers some background on my current situation, Recently I've been doing some independent study on some of the material that will be covered in upcoming math analysis course I'm...

I hope this is the right forum to ask this question. I am looking for a Latex package that is able to draw Braid diagrams without too much trouble. See for example http://arxiv.org/abs/0707.1889v2" (figure 2, page 3). Any suggestions? Thanks in advance.

I found this forum by accident and am learning stuff i never thought i wanted to know. I am getting ready to build a spare tire holder for my off road landcruiser. The metal will be 2" square tubing. The weight it will be holding is a 100 pound rim and tire... Here is a rough picture...

Homework Statement There are 50 balls in a bag, all are the same except for the color. 4 of them are white while the rest (46) of them are red. Now randomly draw balls from the bag, one at a time, without replacement. What is the expected number of red balls that you will draw before you...

This is another question that is impossible for me to complete.i don't even know whereto start. PLLLease help me. Draw a sketch of a function with the following properties: a) The gradient is negative where -2 < x < 2 b) The gradient is positive where x < -2 and where x > 2 c) The...

I need something that I can use to draw a few simple 2D images, that don't have to look pretty. I really mean "draw" (with the mouse) and not generate from a formula, and a minimum requirement is that the program can at least let me try to draw a smooth curve with the mouse and then smooth it...

drawing graph of functions...HELP! ok, i am going to admit i am TERRIBLE when it comes to drawing graphs of functions. I have no idea what i am doing and kind of need a step by step approach. I really want to learn the best way of doing this as its now a big obstacle in my course. The...

\int _1 ^e \int _{1/e} ^{1/y} f dx dy If asked how to sketch the bounds for that: "x starts at x=1/e and ends at x=1/y 1/e is just a constant so that's a straight line and x=1/y is the exact same line as y=1/x" That's a decent enough engineer's explanation right? (no one in university should...

Homework Statement This is a review problem i was given for my final exam tommorow, I am stuck on 1 problem, even with the answer key I am not understanding it.(also sorry but the picture won't copy from MSword, but its a cylinder rolling up a hill) (B) When the lander hits the surface...

Homework Statement I need to draw carefully labelled spacetime diagrams (one per section) to illustrate the following: a) The length of a 'rod' which is exactly 1.0 light seconds long when at rest along the x′-axis in one frame, and which is moving along the x-axis at 0.866c in the...

Homework Statement draw a circuit diagram for a single circuit with the following conditions: a. resistor one is in series with resistor 2 and 3 b. resistor 2 and 3 are in parallel with each other c. capacitor one is in series with resistor 1 d. a voltmeter is used to measure the...

Hello there , I don't know how to draw free body diagrams , so can u illustrate to me how to draw an FBD for an object sliding down a ramp like this one. http://ffden-2.phys.uaf.edu/211_fall2004.web.dir/Jeff_Levison/freebody_diagram.jpg illustrate this in details , please Thanks

Homework Statement With what program (freeware) can I draw a graph with broken y-axis. An example of what I want: I know that this is possible by using Excel, but just in a very cumbersome way, right? Thanks in advance.

Hi, Could you please advise me any software (and location) to draw Feynam diagrams? I knew one softare Feyndraw but lost it... Thanks

Hi, When drawing the FBD (ex. block on incline), and when you split a force into x and y components, where do you put theta when giving the angle of let's say, the incline? Is there a trick to this? I generally know where to put it (basic trig), but for some reason I can't use trig for some...

I'm just a little confused about field lines. I have sketches of equipotentials and I'm supposed to draw the field lines on them. The one I'm looking at is a dipole with a floating electrode in the middle of the positive and neutral charge. The positive is 12V, and the floating point is 6V...

Homework Statement make a drawing of a circuit, showing how a voltmeter is connected to measure the voltage across a resistor and how an Ammeter is connected to measure the current through a resistor. Homework Equations I'm not sure if I am suppose to draw a power source and if i do, I...

box A has place for 2 balls, box B has place for 3 balls balls are placed randomly in each of the boxes until one of them is full if X is the amount of balls used, find: E(x) var(x) i drew the boxes and think there are only 3 options,,, X=[2 3 4] BOX A --- BOX B I) 2 balls...

There are these things where you can write on by putting pressure, and by lifting the paper it clears. I really want one to like write ideas & scratch work and stuff down and quickly erase it. I used to have one a long time ago and looking for it again

Homework Statement http://img191.imageshack.us/img191/5851/lolz32.png A missle explodes in the air, forming 3 pieces equal in mass. Their masses are 0,03kg. First piece started moving with a velocity of 60m/s, which makes its momentum p=60*0,03=1,8 The second piece started moving with a...

am bit confused...years since I have reviewed orthographic drawings...I have a hollow cylinder (say a pipe with inner & outer diameter) and I want to add 6 L-Shaped welds to its bottom to be able to weld it to a plate. I cannot figure out how to draw a blueprint for the same for the...

hi... I am new to this topic and frustrated. I have a curve f(x,y)= -3y/(x2 +y2 + 1) I was asked to draw a level curve of this and I'm not getting anywhere with it. If anyone has any pointers, or can help me with solving this question I would be gretfull. The only other thing this...

Drawing Resistors/Springs circuits?? I am looking for a simple (and free) way to draw resistors and springs and simple block diagrams with labels so that I can insert them into my LaTeX documents. Anyone know of any solutions? I am currently looking at the Excel drawing menu to see of there...

Hi all, I am curious about the effect of long term drawing/sketching/painting on the brain. Is there any serious work being done on this topic? Would be good if someone direct me to some journal articles on this. Thanks

A 1.0kg body initially traveling in the positive x-direction at 10m/s is acted upon for 2.0s by a force in that same direction of 20N. It then experiences a force acting in the negative direction for 20s equal to 2.0N. Draw a force-time curve and determine the final momentum Homework...

hi guys , I'm trying to draw the following function , however MATLAB doesn't like my code . What am I doing wrong ? z = x + (y – 100)^2 where x = -50 : 50, y = 0 : 200 my code : [x,y]=meshgrid(-50:1:50,-0:1:200) surf(x , y , x. + (y.-100)^2) thank you

I have a function, S[q] which is obtained by integrating another function, A[r,q] over r. My problem is that the lower limit of integration, rmin depends on q in a complicated manner. Mathematica can however solve this equation to give several routes, only one of which is real which is the...

hey, I think its time to ask a expert on the matter now. I apoly for my bad English writing at first, I'm from Denmark 26 year old We all know you can take a straw and put it into a glass of water and put your finger at the hole in the other end and pull some of the water up with the straw...

hi everyone, I want to know how i can draw the schematic diagrams of the circuits. I understand the therory but i have no idea how you make the circuits and draw the schematic diagrams of them. Thanks