Drive Definition and 496 Threads

hi guys I read something interesting yesterday(atleast to me) that weight transfer can occur in a car due to drive torque from driveshaft to axle which causes axle to rotate. I found it strange that why drive torque in differential will rotate the whole axle(a small angle however).Can u tell me...

I am college senior in biomedical engineering and am working on a project which will involve the use of a CDROM drive for a senior design project. For the project what i will need to be able to take a CD and be able to tell the drive to point to a specific spot on the cd and read the data. I am...

I know there's PortableApps.com and U3. What other ones are there? What's the best?

The last time I defragged a hard drive was on my desktop computer with windows vista. My laptop seems to be slowing down slightly, I was hoping to defrag it, as it has not been for a very long time. I don't know where to go to access this feature in windows XP. I use "search" in the start bar...

hi in jet engine power generated for two purpose one is to drive the turbine, compressor and other accosseries Second is for the forward jet thrust take an example A engine generates 15000 lb thrsut. how to calculate the following power and mass flow how much amount of...

Hello friends. I simply couldn't find an easier way to explain what I'm looking for, so here's a drawing. And my questions are: 1. Does something similar even exists, and how is it called? 2. With the proper masses/ratios/calculations/whatever & control system, is this device able to...

I recently bought 2 - 1 tb external hard drives from tiger direct. http://www.newegg.com/Product/Product.aspx?Item=N82E16822111019 My computer and other computers I have tried them on will not recognize them both plugged in together. it only recognizes the one i plug in first then when i...

I have an HP Pavilion a6528p desktop. Whenever I insert a cd or dvd autoplay doesn't start. Then when I click on my computer I shows that there is a disk with data on it, but when I click on it, it says: "E:/ Application not found" it used to try to burn a disk even if it had information...

I am trying to do some preliminary calculations for a basic lifting device but some of my numbers seem to be out-of-wack. Could some kind soul take a look if you have a minute spare? Motor Data (max efficiency) RPM: 8311 = 870 radians/sec Torque: 9.213N-cm = 0.09213N-m Output Power = 870...

Maybe Kinetic energy generators attached on the wheels are something ? If we put a thin small tube in the VERY center of the wheel (where the rotation is fastest) filled with some generators. I'll try to draw a drawing sometime to be clearer with the generators positions and amounts...

Ok, so, correct me please - there is a picture attached + title of topic should explain the idea. Where am i wrong? Am i?

I have a laptop at at the moment but I'm afraid that I chose the wrong one. Its a 16in, 7.1lb monster with a battery life of a measly 2.5hr max. I could upgrade the battery but it would add over a pound in weight and make it even bulkier though. I'm thinking about returning it (if I can) and...

Hello every1... I'm a mechanical enggineering student... I've been studying theory of Machines... My academic syllabus includes only "Simple Mechanisms"... Now in Simple Mechanisms...the first thing we get to know is a "Kinematic Link"... Definition of a Kinematic Link:-it is a rigid or...

What is slip in tube drive shaft ? How it is different from other drive shafts i.e1-piece and 2-piece drive shaft?And what is suitable material of drive shaft ,can we use shaft in bicycle ?

Just a question that randomly occurred to me, why is it or is it not possible? What is necessary to make warp drives possible? :smile:

Hi I am trying to designing a robot arm but am having problems calculating the torque required to drive the main shoulder joint. The arm is 700mm long and weighs 3Kg with a mass on the moving end of 6Kg. The arm is required to rotate repeatedly through 180deg then reverse back to the starting...

My understanding of the Alcubierre drive is that a spacecraft is encompassed within a 'bubble' of expanding spacetime (at rear of craft) and contracting spacetime (at the front). I am trying to understand the role of negative energy in this scheme. Am I correct in saying that the...

I need to replace my hard drive. The recommendation is: ATA/100 5400 RPM 9.5mm. I see a lot of faster drive 7200rpm but they are SATA. Is it true I can put this in also because they connector should be compatable. I just need to get 9.5mm or smaller and it would be fine? What is the...

Why does my flash drive not have enough space when it DOES!? I am trying to copy a folder that contains an .iso to install a program. When I right-click the program folder, the properties tab says that size=4.0 GB. When I right-click my flash drive, the properties tab says free space=7.97...

Hi everyone, I was wondering if it might be possible to drive the spit on my barbeque using a thermo cyphon in a closed water system... The idea being to have a standard 22mm domestic copper pipe running through the bbq fire. Both ends of the pipe would be connected to a small water tank...

I used to have to drive across New Jersey and back everyday. This made me laugh. How to drive in New Jersey First, you must learn how to pronounce Newark... It is New-erk, not New-ark. (Actually, it's pronounced 'NORK'.) 2. The morning rush hour is from 5:00 a.m. to noon. The evening...

I operate a CNC router table with a high speed spindle. I'm looking to upgrade to a new spindle but need to know if the variable frequency drive I currently have will work with this new spindle. The new spindle has the following stats: 300Hz, 1kw, 18000RPM. The frequency drive is made by...

Homework Statement I'm just working through a few past mechanics papers and this question came up: A belt drives the circumference of a cylindrical wheel of radius R and mass M with no slipping. The tension in the belt is T. Friction in the wheel bearing causes an effective torque N...

[SIZE="3"]I am having trouble with my DVD-R drive. The computer is one year old. In the beginning all was well - and then I bought new CD-R discs which the burner rejected continuously. Assuming it might be that it just didn't like the discs, I didn't let it bother me and ignored it. Today...

Stress Calculation on "D" Drive Shaft Hey guys, I have a problem. I need to calculate the stress on on a shaft that's driving a fan. The shaft setup is pretty simple. It's a basic circular shaft, then one side is milled to a flat, slightly resembling the letter D. So, of course I have the...

We have often heard that, statistically speaking, it is safer to fly commercial airlines than to drive. How would one measure this? How is it measured actually and is it meaningful? And if anyone has link to the actual numbers, that would be great. This is my stab at it. Pick a sample...

Homework Statement A computer is reading data from a rotating CD-ROM. At a point that is 0.030 m from the center of the disc, the centripetal acceleration is 120 m/s2. What is the centripetal acceleration at a point that is 0.050 m from the center of the disc? Homework Equations ac =...

I am involved in a legal case and I need to know some things about flash drives. 1. Does anyone know if it is possible to find out for sure exactly when a file was saved onto a flash drive? I know that you can acess the "Date Created" and "Date Modified" information through by right...

A baseball is hit deep to center field. The vertical position from home plate of the ball with respect to time is described by: v(t) = -20t2 + 103.5t +5 in feet above home plate The horizontal distance from home plate is described by: h(t) = 84.32t in feet where t is in seconds HINT: The...

I got this in my school FYI email: I think my engine and transmission oil needs more time than that to heat up and work properly. Also, suddenly driving off with a cold engine block is a good way to develop cracks in the cylinder walls - which is why you don't just pull the throttle all the...

I can give the following description to the problem, but I don't specifically know what should be done to drive an actuator (specially a piezoeelctric one) in its resonance frequency using a feedback. **The sensor consists of a piezoelectric transducer and a vibration pickup. When an...

I am using a gear mechanism in one of the toys that i am making for my baby. but the gear makes a lot of noise. Will replacing it with Roller drive or friction drive reduce the noise? Is there any other way to reduce noise from gear drive?

I love Star trek and I was thinking, how to create a warp drive. I have read a discusion about EM waves on this forum, there was written that they do not need any medium for propagation and : “In a simplified sense the oscillating E field sustains the oscillating B field which sustains the...

I recently got the following message during booting; "Smart failure on Primary IDE Channel 3. Back-up your data, Disk drive failure may be imminent" I've dealt with this problem previously, only problem now is I have two HD drives. How do I know which one this concerns?

Preparing a 0g test for “space drive” that apparently conflicts with law conservation Plans of testing a working model in a 0g environment are being considered for the first semester of 2009 (Zero Gravity Flights) we hope to demonstrate we have a practical working idea. I would be grateful if...

I have an external Western Digital 320gb hard drive that has never given me problems. However the only thing i can think of that has caused sudden problems for this external SATA drive is the bios flash that i recently updated. The drive is recognized in mycomputer, however it doesn't say how...

As I understand it, a beamed core antimatter drive would produce thrust by annihilating matter and antimatter and ejecting the results of the annihliation via a magnetic nozzle. The usable results would be charged pions, which would decay into muons, correct? So my question is, if a...

If a spaceship is traveling at 90% the speed of light on the X axis. And it is also traveling 90% the speed of light on the Y axis. What is its velocity?

Shawyer's "Electromagnetic Drive" Hi, I'm sure you've heard of this proposed concept by Robert Shawyer for an "electromagnetic drive" which is claimed to generate an unbalanced force inside of a resonant QED-cavity, thus causing acceleration that appears to violate Conservation of Momentum...

I stumbled across it on wikipedia. I'd never heard of it before but sounds quite interesting. I wonder if it'll ever be pursued as a way for faster than light travel. I think it's clever the way it allows this without defying the laws of relativity. What's everyone elses opinion?

Homework Statement I try to drive distance formula which is S=vt+1/2at^2. I use velocity and acceleration formula to drive the distance formula but i couldn't get the distance formula.is there anyone know how to drive S=vt+1/2at^2. and how that came from in the first place . thank...

Hi guys I need help with my pc I use for my projects and programming.It doesn't want to boot from the hard drive and really need it to because I have some very important information in it. I am not good with hardware(hope one day i will) but have tried everything I can to get it working...

Hello all. I have a dell inspiron 1525 laptop, and I've had it for about 4 months. I've been downloading music here and there, but nothing too major. Earlier this week I realized that my computer had used about 70gb of memory, and I had no idea where it was. So I downloaded a disk analyzer...

There are probably earlier threads about this, but I couldn't locate them quickly, so risking to be redundant with the question but .. .. my daughter bought herself a LaCie 500gig harddrive for unlimited movie looking. The gadget works fine with XP, but Vista ignores it completely. Any tips?

It's done me good service since 2002, but about three days ago, my desktop machine refused to boot. So I did some digging on the Microsoft help site, configured my BIOS to boot from CD, and stuck in my Windows XP disk to attempt to repair Windows. Attempted to start Recovery Console, but it...

Your opinion, please. Does one of the two variations of this circuit offer a clear advantage, or is it a wash (see attached)? This indicator circuit turns on the LED below 11V (set by the zener). The LED cathode must be at ground (it is actually part of a tri-color LED with a common cathode)...

Hi, today I tried to open a cd with my cd/dvd - rw drive and I got the error: "Access denied - incorrect function" I know it's not a hardware problem because I can read and write to dvd's and cd's that I burn with my computer - I only have a problem with cd's burned on a different computer...

I'm picking up an 8gb of 16gb flash drive. I'm planning on installing a linux distro on it, since I find myself using liveCDs so much anymore. Any suggestions? I've used puppy and DSL before, but since I'm not really limited spacewise I'd like to use something a little bit more...

I frequently Update file on my memory stick and (foolishly) forget to backup(!) could i script an auto run for when i plug my memory stick in it would sync. specific files. Please reply soon I need Help!

I have a HP iPaq 1900 that only has an SD card slot and an iPod hard drive with 20gb and ata 6. SD cards are too expensive and I want to make use of my hard drive. Is there a way you can think of that can connect the hard drive to the iPaq? I was thinking of buying an SD card...