My Son Got Shocked by a D Cell Battery [closed]
Every electronics engineer that (nearly) zapped him/herself with mains power as a kid and denied to parents about having done anything that was forbidden raise hand (vote up). 1 for myself.Do not do this at home!, but on the plus side, ever since that very day I have huge respect for these seemingly innocent copper wires. The shaking knees wore of in a couple of hours.1. Does anyone else think that those magnetic leather cell phone cases kill your cell battery????Those cases are perfectly safe for cell phones. I've used them for years with no problems at all. The magnets in the cases are strong enough to keep the cases closed, but not strong enough to do any damage to the phone.2. My new 12 cell battery won't charge. Do I need a certain type of adapter?I bought a cheap iPod car charger (Will never do that again!) and it did not work! My guess would be that there was/is something wrong with the adapter part, or the cable3. dead battery can i tell if i got a dead cell with a battery tester?You can take the battery to an auto parts store such as NAPA, and they will test the battery for free. The only other way I know of is to charge the battery and use a volt meter to see what voltage the battery is operating at. If a cell is dead, it will operate at less than 12 volts.4. Can anyone tell me that how to make an electromagnet with a cell(battery) of 1.5 V?simply coil a wire to a metal, preferably an iron, but a screwdriver also would do. then attach the end of the wires to the battery. presto, you got the electromagnet. I also prepared a research for you. Electromagnet, device consisting of a solenoid (usually a cylindrical coil of insulated wire wound in the form of a helix), in which an iron core is placed. An electric current passed through the coil induces a strong magnetic field along the axis of the helix . When the iron core is placed in this field, microscopic domains that can be considered small permanent magnets in the iron align themselves in the direction of the field, thus increasing greatly the strength of the magnetic field produced by the solenoid. The magnetization of the core reaches saturation once all the domains are completely aligned, and an increase of the current in the solenoid has little further effect. When the current is switched off, the core retains only a weak residual magnetism. Microsoft Encarta 2006. 1993-2005 Microsoft Corporation. All rights reserved.5. Would a new 9-cell battery charge on my old 6-cell battery adapter?yes,it fits ok do not worry6. help to keep my cell battery alive for longer than a few hours!?Charge it every night ! Leave it on for a while over 4hours. Then it should be fully charged x7. How to tell difference between a cell and a battery?a battery z a combination of cells8. what common household items have the 3v cell battery?3v Watch Battery9. Is there a button cell battery I can use as a substitute for AA's?No, there is not10. how do i make a wet-cell battery?You can probably make a voltaic pile out of pennies, nickels, kitchen towel (if you can not find blotting paper) and vinegar Or a single cell with a cup of vinegar, a steel nail and some copper wire11. Customized Laptop! (how long will the 12-cell battery last)?You have configured a very high end laptop, a true desktop replacement, using very much power hungry components. A 12-cell battery would last around five to six hours under constant use, if I would have to give an estimate, due to the components you chose. The specifications you list are actually too much for just playing a game such as Counter Strike. You could do with a much simpler configuration. However, if you would like your laptop to be future proof, then you are definitely on the right path. You list that you will be using Windows 7 Ultimate. Please make sure that this is a 64-bit version of the operating system. If it would be a 32-bit version, then 8GB of RAM is overkill, as a 32-bit operating system cannot allocate more than 4GB of RAM, meaning that the other 4GB of RAM will not be used, but it will still consume power by the way. Normal laptop hard drives have a RPM of 5.400, whereas the hard drives which you list are 7.200 RPM. This means that the hard drives are faster than normal laptop hard drives would be. They have the same amount of RPM that most hard drives in desktop computers would have, so this will give you a good performance boost. The performance difference between one 500GB hard drive or two 320GB hard drives depends on how you configure your system. If you would choose to mirror your hard drives, then you would not gain any performance. Mirroring two hard drives does provide fault tolerance however. If you would use one hard drive for your system files and software and you would use the other hard drive for your data, you would gain performance as both hard drives can be read from and written to at the same time. If this difference is noticeable however, depends on how much data you would read and write simultaneously. I would personally always choose for the two hard drive set up, as even the most little performance gain is welcome and it allows you to run a dual operating system set up more easily, as you could easily use one hard drive per operating system. As for the weight of the laptop, have a look at the HP website for how much the base model weighs and add the weight of the larger battery and an extra hard drive and you will round and about be correct.