Mobile Definition and 148 Threads

Since the combined speed of electormagnetic waves can be 'c' and that they travel in space at 'c' leaves no component for time, hence the time on a watch on a beam of electromagnetic wave does not change at all. With this understanding, assume two stationary mobile phone users U1 and U2...

Hi everyone, I have an unusual question: Do any of you have any ideas on a DIY method for improving mobile phone reception? (my phone does not have an external antenna/antenna connector) I figured that asking physicist would be the best way of getting reliable information! I know that...

would it be possible to have a system that has 4 engines on the corners of a 'fuselage' and these engines can rotate about joints giving the plane propulsion and deceleration. also this helps the pilot manipulate tha plane a lot easier (sort of like a helicopter). NOTE: these are like the...

I want to know how to configure my K750i as a dial up modem

Hi Guys, :smile: My mobile phone battery was completely drained and so I put it up for charging. However, inspite of the charger providing charging current to the cell phone, the phone shut down several times indicating ‘Battery Low’. As per my understanding, the charger charges up the...

I have a mobile that i only keep for emergencies, the strange thing is, it will not turn on after a recharge, i have to take the battery out and and put it back in, then it works fine any ideas why this happens?

To construct your very own unlimited energy supply, go down to the hardware store and buy yourself a nice long and strong rope. Then tie one end to an electrical generator and the other end to some other galaxy. The expanding universe should take care of the rest. Is this a true perpetuum...

Homework Statement This isn't homework, I just can't find any information on the internet, and I don't have the neccesary equipment available to perform a test. Just wondering if anyone knows an average amount, or at least a link to a paper that has done something as mundain as this. How...

hi am going to do my mini project this feb...i have chosen this as my topic.. if anybody has information about this topic it may be of greater help...you can also give suggestion about some advanced technology in this particular field...

Objective: To build a device that will transport a 1 kilogram mass a distance of 10 meters using the energy released as the mass falls a distance 10 centimeters. Rules: 1. The only source of energy that may be used to move the vehicle is a 1 kg mass falling 10 cm. 2. All parts of the vehicle...

Hello, friends! I've google about the question below but no success! The question is: Gps signals inside buildings are nonexistent or very weak, but mobile phone and am and fm radio signals are good, so the question is: why gps satellites and mobile phone comunications don't use emission...

See http://technology.todaysbigthing.com/2008/12/16" . Can someone explain this?

Hi, This is my virgin post. This forum has been a great source of information for the past one year. I am a high school teacher from Singapore. In the study of electrostatics (more specifically induction), we often encounter the scenario below: Two insulated metal spheres touching...

A real life situation exists where I'm attempting to turn the back of a van into a faraday/rf sheilded cage to transport 2 electromagnetic sensitive beings too properties where there is no microwave tower coverage in the hope they can live fuller longer lives (than are currently expected) in a...

Torques: Rotational Equilibrium Mobile :) Homework Statement Please! I really need help figuring out how to make a balanced mobile! I would really appreciate anyones help! Directions: Apply what you know about torques by making a mobile. Shown below are five horizontal arms with fixed 1-...

I often read about how electrolyte conduct electricity, the websites I searched often explain only in terms of mobile ions are able to move freely in the solution, therefore they could carry charges throughout the solution bla bla bla. However, none of them explain how does that help conduct...

how are phones made to work like remote? i have heard of many innovations like mobile operated robots mobile operatd water pumps... could'nt figur out how the circut is made?

How much do you think that a used, single wide mobile home would cost in a very rural area? Yes; I know that it depends on many factors. For my example, the used mobile home has a septic tank and a well and everything works and is in decent condition. For my xample, the mobile home includes...

How many of you use your mobile device as a wireless modem for your laptop? It took me a while to figure out how to do it since my carrier Sprint likes its customers to believe that they have to pay extra for this "service" even though it's simply a matter of routing the data from your device...

Below is the picture of a Newton rigns experiment but u can see the rings at the lens surface outside the apparatus , what is the reason for these fringes to occur ? The pic was taken with a mobile camera (2MP) 1st explanation :I think this is like two virtual sources of fresnel biprism ...

I have a Sony Ericsson w810i phone. The screen dimensions are 220x176 px. So.. there are two ways i can view a video clip with 16:9 aspect ratio: either vertically: http://img187.imageshack.us/img187/7227/cellvideo2og3.jpg videoRes: 176x99 or horizontally...

Radiation from mobile phones delays and reduces sleep, and causes headaches and confusion, according to a new study. http://news.independent.co.uk/sci_tech/article3353768.ece Can this be trusted?

can anyone here find my request?? i want (if it exists) a program that contains all tables and formulas of calculus that can be installed on the mobile phone, i don't want a program to operate calculations , but just show the rules.

How come my mobile phone recharged in 5 minutes? On monday i had accidently left my phone on all day, and the batteries were almost empty. Then i forgot to recharge it in the evening, and the next morning was only able to do so for 5 minutes. When i unplugged it after 5 minutes, the batteries...

hi guys i would like to get data-or informations about the design of mobile cran components such as(hook,boom,wire rope drum and the wire rope)and more if it was allowed,i did a lot of google search and didnt find really what i wanted to get,we are designing a mobile crane its capacity is...

When I was a teenager, I tried to design perpetuum mobile, dreaming of glory, money, and joy of the fact that I would solve the world energy crisis :) But now, I think even if I had succeded, would it help energy crisis at all? We already have "perpetum mobile" in the form of rivers, tides...

What is the difference between cdma and gsm mobile phones related to their working

i had an idea about a perpetual motion machine. i have read and saw that my idea is just like Robert Boyle's self-flowing flask. http://upload.wikimedia.org/wikipedia/commons/3/3b/Boyle%27sSelfFlowingFlask.png from what i read this machine who by my idea should let the water move for...

some people say you can't have more energy output from a system than you put in it since it violates second law of thermodynamics. doesn't it violate the same law when one drops an a-bomb on the ground? don't you get much much more energy than the one you could get only from the kinetic...

Hello everyone, Anyone know a good book for programming a windows mobile device?? I'd appreciate it.

OK here is the situation chevy factory DVD(panasonic) they said they didnt make it.Factory overhead screen. We are trying to find the video out from the DVD player to the screen, so that we can add more monitors. we are testing the wires but cannot find the 2 video wires, I know that in some...

2.5" Mobile Hard Drives Why its capacity is still at about maximum 100 GB, seldom has 120GB. When can we increase it to >200GB ? Can we increase the platter diameter to 3.5" but the drive remain flat so that it can fit nicely into the notebook? This will increase its capacity.:biggrin:

My 3 year-old Sony Ericsson was spoilt, so i checked out for information about the latest mobile phone and discovered that so many things had happened to mobile phone technology, it is really attracting! What mobile phone are you using? Do you need MMS, internet, camera, polyphonic ringtone...

According to the laws of Conservation of Energy, there can be no such thing as a perpetuum mobile of any kind. The purpose of this topic is not no disprove them in any kind. But then i began to think: A battety re-charger is powered by a battery which in turn runs the battery...

Can anyone explain why I get a beeping noise on my speakers when I am about to get a phone call on my mobile phone? Just something that I've become used to, but I realized I don't actually have a clue how it works, and am quite interested. Thanks for any help! Michael

hello all of u... i just wonder which is a better mobile to buy ... nokia 6630 or nokia 6680 ?? 6680 is about $160 more expensive ... why do u think 6630/6680 is better ? any help will be gr8ly appreciated ... cheers :smile:

I backed into the rear wheel well of a parked car in a cramped parking lane. I left a note, and waited a while for the owner, but they didn't show. The dent was small, and the car already had a few. I'm hoping the owner will look at my note and the dent, say "So what?," and toss the note...

i was being ask to describe the energy changes involved in the use of mobile phones and a television i m noot even sure i have fully understand the question, energy change? say in mobile phone, all i can think of is signal wave turns to electric pulse which then changes into...

from my book it says: The chemical interactions of the mobile phase and sample, with the column, determine the degree of migration and separation of components contained in the sample. For example, those samples which have stronger interactions with the mobile phase than with the stationary...

www.environenergy.co.uk In the animations look the animation that explains how it works, otherwise you can missunderstand

Are Mobile Phones Safe? There seems to be a lot of controversies around the safety of mobile phones, for instance the radiation and heating on skin cells. What is more puzzlikng is that a recent article appeared in my local newspaper claimed, men who carry mobile phone in their pockets produce...

I read somewhere that apparently mobile phones are being made to last only a short amount of time (maybe a year or so) so that people have to keep buying new ones when theirs packs in. I've had my Panasonic GD87e phone now for a year next month and it has started to turn itself off in the...

I was wondering what would be the best idea for mobile power? Batteries, generators, solar, nuclear? Something/Anything that can be put on wheels and moved... :)

I am a student at secondary school interested in physics and there is a problem I've been thinking about for two days: I just can't find out why the following perpetuum mobile doesn't work. Suppose we let two charges Q and -Q advance towards each other in air. We exploit the work done by the...

My Mobile Hurts my fingers ... hands .. then whole arm! Hi, My mobile went messed up for sum reason and i have stopped using it now. It used to make my fibgers hurt...it got worse and worse until it made my fingers numb in a matter of minutes if i used it. Thne it hurt my whole arm one day...

I am currently studying an International Baccalaureate Physics course, and I am currently in my first year of study (i.e. I'm 16). As part of this, I am doing a presentation on cellphones; not my decision, but to get to the point: If anyone could refer me to some information detailing which...

We have PC Fair this month, many offers of desktop and notebook. For notebook, centrino one is 30% more expensive than P4 mobile, but the speed of centrino is slower. I need a notebook for future longhorn and .NET programming, is a normal P4 is enough to support my need? Do i need special...

"Mobile labs" aren't labs, it seems... It looks like the two supposed "mobile biological warfare labs" are, in fact, not. First, US/UK analysts disputed Bush et al's claims: http://query.nytimes.com/gst/abstract.html?res=F20E1EFD3C5D0C748CDDAF0894DB404482 . Tony Blair's government...