What is the total length of wire you will need to meet these specifications?
Magnetic field is NOT MEASURED IN kG Your question DOES NOT MAKE ANY SENSE.
What is the total length of wire you will need to meet these specifications?
B = mu * n * I where B = magnetic field, mu = permeability of space, n = number of turns of wire per unit length and I = current. Since B and I are given and mu is fixed, n is the only thing you have to vary. Solve for n from the given information. Once you know how many turns per unit length you need, since you know the length (45 cm), you know the total number of turns. One turn is 2*pi*12 cm, the circumference of the tube.
There are many specifications one should look for before buying CCTV cameras. They are:Wider Camera CoverageOne of the factors that has contributed to the explosive popularity of megapixel IP cameras is their ability to provide wider coverage. One should look for wider coverage of the camera.Lux & Light SensitivityThe light sensitivity of a camera is measured in Lux and this is the standard specification you will see that defines how well a camera can see in poor lighting conditions. In order to capture good quality images in low light or dark conditions, a day and night camera that takes advantage of near-infrared light is required.Higher Resolution and HD VideoMegapixel IP cameras can capture High Definition Video (HD Video) and provide greater detail improving identification. A 2 megapixel camera is an excellent choice for capturing license plates and can cover a 24 foot wide point of entry or exit. We should always look for megapixel of the camera.Choosing the Right LensThe lens is what gathers the light for the sensor. Everything the viewer sees, or that gets recorded on the DVR comes through the lens. It determines the distance at which a car's number plate can be read, and a face can be recognized because the lens controls the focus. We should always select the camera with the right lens as per our need.There are a number of things to look for when buying CCTV cameras. Some are technical factors which apply to every situation regardless of the intended use:Every camera can benefit from a better lens and high quality sensor. Other factors are more dependent on the intended use of the CCTV surveillance camera, as some types are more useful in some situations than others. A day/night camera is awesome for keeping an eye on visitors coming up the drive, but it may not be the best choice for monitoring staff of the company or business premises. Many businesses may be better served with either dome cameras covering the entire floor or small bullet cameras to monitor the staff. Therefore, we can say that there is different specification for different situation as per our need. One thing which we should definitely look for is the quality of the camera. One should never compromise on quality of the camera.
Is it safe to plug my entertainment center to a extension cord?
xreginabethx is right. that's not as secure as making use of the means bar quickly into the wall. rather of purchasing for an extension twine, get a means strip with a twine of sufficient length. The NEC and maximum community electric powered codes, in fact, do no longer enable using 1 extension twine or means strip plugged into yet another. the two are considered "short-term wiring" and one "short-term cord" plugged into yet another isn't allowed. this would not advise that's "unlawful" (you won't be able to be arrested for it). In a advertisement development, however, fines are achievable for prolonged-term code violations. Worse: ought to your place burn down, if the source of the fire is traced on your means strip, and that they locate information of "stacked" extension cords or means strips, the coverage won't pay off. in case you're able to desire to do this, i could strongly propose getting an extension twine of *bigger* gauge than that on the means strip. reason: the means strip's twine is chosen to be sufficient gauge (cord thickness) for the optimal load on the means bar and the twine's length. including yet another length of an identical gauge cord isn't as secure. you could no longer tell basically via the thickness of the outdoors of the cords, the two. you ought to look heavily on the twine. Molded into it or stamped onto it will be a designation like "2-14" - this ability 2 #14 conductors. The #14 is the gauge. decrease numbers are thicker. So in the adventure that your means strip has, for occasion, #14 cord you're able to wish an extension twine with #12 cord in it. some cords with #sixteen cord (thinner) have very thick rubber jackets that makes them look greater heavy-accountability than they are certainly.
Need more towing power, 00 Jeep XJ 4.0L, ? stroker, thinking Golen, any help? any problems?
I like the stroker idea as well. You'll up the displacement to 4.6 L. I had a little known (in the states at least) 282 (4.6L) in my CJ7, and the increase in horsepower from the 258 (4.2 L) to the larger displacement motor was noticeable. I never documented it but it felt like 20% at the pedal. With all the other goodies that you have, you should realize the same or better. If you're scratching your head regarding the "282", I'll tell you that it was only manufactured in Mexico by VAM (Vehiculos Autromotriz Mexicanos), the Mexican arm of Rambler/AMC. The motor was designed here (in Lerma, Mexico where I live) to accomodate the weight of Wagoneers as V8s were not used here often unlike the 360 which was used in the states. Anyway, the 282 is a great motor, basically the same as the 258, but with larger pistons and a head redesigned to accomodate larger valves for better breathing (borrowed from the 360) The spark plugs are smaller in diameter as well because there is a space problem. I understand that some of these motors made their way into the states in the 80's in the sand racing circuit. Really torquey!!
PHYSICS Question about constructing a solenoid?
r=0,06 m h=0,55 m I=2 A B=2 700 G=0,27 T (if I am not mistaken) i am not going to derive it but I hope you know that the magnetic field in the center of a solenoid is given by B=mu0*N*I/h where mu0 --4pi*10powered-7 N -- number of turns on the solenoid I -- current h -- height of the solenoid From here you get how many turns of wire you have N=B*h/(mu0*I) N= 59 116 turns The length of the wire is I hope you agree L=N*2*pi*r L=22 275 m L=22,3 km
The transport of large amounts of electrical power over long distances is done with high-voltage transmission lines, and the question is: why high voltage? It certainly has a negative safety aspect, since a low voltage line wouldn't be harmful (you can put your hands on a 12 V car battery, for example, you won't even feel it; but make sure you don't put metal across the terminals, you'll get a huge current and a nasty spark!). Electric energy is transported across the countryside with high-voltage lines because the line losses are much smaller than with low-voltage lines.All wires currently used have some resistance (the development of high-temperature superconductors will probably change this some day). Let's call the total resistance of the transmission line leading from a power station to your local substation R. Let's also say the local community demands a power P=IV from that substation. This means the current drawn by the substation is I=P/V and the higher the transmission line voltage, the smaller the current. The line loss is given by Ploss=I²R, or, substituting for I,Ploss = P²R/V²Since P is fixed by community demand, and R is as small as you can make it (using big fat copper cable, for example), line loss decreases strongly with increasing voltage. The reason is simply that you want the smallest amount of current that you can use to deliver the power P. Another important note: the loss fractionPloss/P = PR/V²increases with increasing load P: power transmission is less efficient at times of higher demand. Again, this is because power is proportional to current but line loss is proportional to current squared. Line loss can be quite large over long distances, up to 30% or so. By the way, line loss power goes into heating the transmission line cable which, per meter length, isn't very much heat.