Convert Definition and 571 Threads

Hi all, How to convert the root of an equation from symbolic form into an ordinary from? I have tried to use the N command, but still displaying in the symbolic form. Thanks

How can I convert the voltge measured across a photodiode to light output or intensity or any other photonic unit? I am trying to measure the light intensity/output of some LEDs using a photodiode but the photodiode measures voltage as a function of light intensity.

Homework Statement When we're given an equation in form r = r0 + sa + tb, how do we convert it to scalar form Ax + By + Cz + D = 0? I've been having trouble with plane form, but I can do it fine when its given in 2- or 3-D form.

The problem is (\sqrt[4]{6x})^3 And i have to convert it to exponential form, and I forgot how to do this, so i need some help. Thank you.

If we have capacitance of 1840 Farads/gram, how much Wh/kg (energy density) it will be? How it applies to pseudocapacitors...

Homework Statement Convert the equation to a first order system. d^2y/dt^2 + 3dy/dt + 2y = 0 The Attempt at a Solution Set d^2y/dt^2 = dv/dt dy/dt = V So, I now have: dv/dt + 3v + 2y = 0 Now, I'm not sure what to do with that Y, In my notes we only did examples with...

I have a series of maps from various parts of the world. Each map is 512 pixels by 512 pixels. I also have approximate left, top, right and bottom latitude and longitude values for each map. I'm wanting to plot variable lat/long value on the maps which need to be converted to x,y values -...

http://www.bluemelon.com/missj/myfirstalbum#photo-1201004/T800600 So that ^ is the acceleration vs time graph that I'm working with...I have to fill in Velocity vs Time and Position vs Time Tables...and then draw graphs based on both tables...Can someone please make sure that I've gotten the...

Hi PF, I would really appreciate it if you can help me through this math problem. I have 3 angles: x, y, and z. I need to convert them into x,y,z velocities (say 5 m/s) in that direction. I have no idea where to even start. Did a lot of searching to no avail :(

Hello ,i have the following problem in mathematica and want to do it in matlab. mathematica : ... Walk1D[n_] := FoldList[Plus, 0, steps[n]] LastPoint1D[n_] := Fold[Plus, 0, steps[n]] ... nsteps = 200; nsq = Floor[Sqrt[nsteps]]; MeanSquareDistance1D[n_Integer, m_Integer] :=...

Hey, I'm working on a project for my Computer Organization class and I have to read in 2 separate times (in military format with no ":" ) as strings and then find and print the time difference. I am able to read in and save the strings no problem, but I don't have a clue as to how I can...

What is the mechanism that results in formic acid quickly converting to CO2. I know this happens under basic conditions so I'm assuming the first step is forming the formate ion.

Homework Statement I want to write an assembly program to convert a decimal to binary, octal, and hexadecimal but don't know how. I already know how to program the conversions in Java. I have a basic understanding of how assembly works and computer architecture. I am trying to use the...

Homework Statement convert 0.e to binary Homework Equations The Attempt at a Solution the method the teacher taught for numbers less than zero was multiply by the desired base. then take the whole number and write it down as part of the converted number and drop it. ie 0.8*2...

when we convert energy to mass, where do the other characteristics of matter, such as charge, come from?

A Math quicky-Can you convert any repeating decimal to a fraction? For example: 0.555... converts to 5/9, and 0.533333... converts to 8/15. So convert 0.88118811... to a fraction.

how to convert accelerometer data to metabolic equivalents(METS)?? hi all i would like to ask if how do i convert accelerometer data to metabolic equivalents(METS)?? by the way I am using this formula: Total Calories Burned = Duration (in minutes) X (MET X 3.5 X weight in kg)/200 i got that...

Homework Statement Convert ethyl alcohol to vinyl acetate ( in not more than 6 steps).. Homework Equations The Attempt at a Solution this is wat i tried: first added conc. H2SO4 at 120 degrees , ethene is formed , then added Br2 in CCl4 , 1 2 dibromoethane is obtained ...then...

I know that there's probably a way to do this with regexp, but I don't know regexp (yet). So does anyone have any tips on how to create the regexp expression for it? (and what other ways are there?)

Hello all First time post here. For a Christmas Village display for the houses, I bought a 15 bulb LED light set that is battery powered that I planned to convert to Transformer power so one, it can be controlled by the house voltage timer system I am using for the other lights, and two, so I...

I have 2 rechargeable 18v battery pack from cordless drill which I'm thinking of using as laptop charger and compact camera battery charger. These packs comes with 220v adaptor. Me and my 12yo son will be doing a week-long research for his school project (climate change) this Xmas break...

I'm Canadian, and I'm trying to convert the draw weight (55lb-65lb) into something I can put into 1/2kx^2. Please help!

Hi all. I am doing a programming project where I have a map which is 879x436 pixels. At all endpoints I have the geographical coordinates in latitude and longitude corresponding to 0x0, 0x436, 879x0 and 879x436 pixels endpoints X/Y in all corners. My biggest problem is how to calculate the...

Hi everyone, I am no expert in any means, so if what I am asking is silly, just tell me. This is an example. Lets say I have a stove top, and I turn it on full for an hour. Without putting anything on it, how can I harness the heat energy and store it, into let's say something like a...

Can anyone help me convert 12v DC to AC for the purpose of measuring fluid permittivity in real time, automotive application? I'm new to PF and limited experience, so all the help/details you can provide are greatly appreciated.

Hi What is most efficient way to convert mechanical energy into heat?

Homework Statement Convert MeV/cm^3 to rads Homework Equations I wish I knew.. The Attempt at a Solution I tried looking up the unit conversions, but find nothing that connects them, I know rads is connected to the Gray which is J/Kg but can't connect it to the MeV/cm^3. Any ideas?

Homework Statement Convert the following expression into sum of products and products of sums (AB+C)(B+C'D) Homework Equations Distributive Property The Attempt at a Solution for product of sums it would be (AB+C)(B+C'D) since it is already in this form. When calculating sum of...

I am constructing a small wind generator for a college project. I want the 0.1 V AC output of the generator to charge a battery. To do this, I need to convert the current into DC. I am familiar with things like bridge rectifier circuits, but the smallest diodes I can find have a forward "turn...

Hi I want help to convert mg to kg ex: 1250mg --- > kg Are we multiply 1250mg X 10^-3 or multiply 1250mg X 10^-6 I want your help >>

When matter is turned to energy does this mean that all the quarks and other particles are converted to photons? I want to know if all particles can end up as photons (by any process at all). Its important to me to know this. Please answer only if you know the real answer without...

Homework Statement Show how the equation of a line y-2=4x-4 can be converted into the equivalent line equation of 4x+y-6=0. Homework Equations The Attempt at a Solution The closest I have got to it is 4x-y-2=0 by adding and subtracting terms to both sides.

Homework Statement Convert 33.9 to binary. Homework Equations Division by two and remainders The Attempt at a Solution I'm unsure since it is .9. Using the dividing by two method with the remainders wouldn't account for that. Could I do something like this? 33.9 = 339 *10^-1...

the CFG S->aSbS|bSaS|e

Homework Statement Got a charge of 2CGSEm need to find it in SI Homework Equations 1C=2.998*10^{9}CGSE The Attempt at a Solution Just a plain question, I get q\approx6.66*10^{-10} Is that correct?

Hi . I want a to write a function in c++ that get two vectors ( whith same size ) and return the rotation matrix to convert first one to second . But i don't know the algorithm and formula . can anyone help me please ? thanks ... :)

Homework Statement I did an experiment of mass vs. period and I got the mass in (g)rams and the period in seconds. My question is, do I have to convert the mass from grams to kilograms? Homework Equations N / A The Attempt at a Solution N / A

Homework Statement H(F) = 5/(1+j2piF/10) Rewrite in polar form, that is, in terms of magnitude and phase. Homework Equations The Attempt at a Solution phase is the 2piF/10 but I'm not sure how I account for it being on the bottom of the fraction

Homework Statement Which of the following products of ratios gives the conversion factors to convert meters per second (m/s) to miles per hour (mi/hr) Homework Equations a. [5280f/mi] x [12 in/f] x [2.54 cm/1 in] x [100 cm/1m] x [3600 s/1h] b. [5280f/mi] x [12 in/f] x [1 in/ 2.54 cm]...

Homework Statement So I'm trying to solve a problem and it asks: If 1 ml of 10 N NaOH is added to a liter of the buffer prepared, how much will the pH change? I know how to solve the problem but one thing is really confusing me, how am I able to convert the 1 ml of 10 N NaOH into moles...like...

Ok I should say up front I am not near as brilliant as you fine folks, I was a C student now I am a Dad that can't figure his 11 year olds homework out . I hope someone will be so kind as to help me lol. Scenario: We are going tuna fishing, so we need a live bait (anchovy) tank. This...

How do I convert gph to psi?... Here is the deal, we are testing a 24" pipe for leaks doing a pressure test. the pressure at the pipe in question is 185 psi, and it lost 4 psi. I have a chart showing the allowable loss in GPH, but I don't know how to convert to PSI. Since this was a test...

Homework Statement please convert the below(P) into formula using (m), or give an algorithm using (m) to get (P) m=2, P=0 m=3, P=3 m=4, P=3+5 m=5, P=3+5+5 m=6, P=3+5+5+7 m=7, P=3+5+5+7+9 m=8, P=3+5+5+7+9+9 m=9, P=3+5+5+7+9+9+11 m=10, P=3+5+5+7+9+9+11+13 m=11...

I don't know the answer to these questions: 1/120th of a second = how many milliseconds? 1/240th of a second = how many milliseconds?

Homework Statement How do I convert ax_1+bx_2+cx_3+d=0 into vector form? The Attempt at a Solution I am completely at a loss here, mainly because I don't quite understand vector geometry.

how exactly is the voltage from triple phase power lines transformed into 120/240?

Hi, I'm trying to calculate the minimum mass of a star, where M=PV³/2πG The values I've been given are V=400km s^-1 and P=34.4 hours. Does this mean that I have to convert these values to SI units, i.e. give the values in terms of metres and seconds rather than km and hours? This would...

Is it possible to convert electricity into propulsion force? My friends and I are discussing about this subject. Is it possible to build a device which can convert electricity into propulsion force? just so you know, we have incessant electricity produced by solar cells and if that...

how to convert dc voltage into higher dc voltage using transformer? i am tring to convert 9 volt dc into 120 volt dc , and i ve to use transformer ,,, the problem is the transformer must have input ac voltage as it work on flux variation . i think the solution is to convert the input dc into...

how is euler's formula useful? it must have something to do with converting from the time domain to the phasor domain and back, but i can do that without euler's formula