Shenzhen Green Tech Lighting Co.,Ltd was founded in 2008, Certified with ISO9001:2008 management system. We are professional Outdoor lighting manufacturer in the LED semiconductive lighting industry who has been all the time devoted to the research, development, manufacturing, selling and design of LED Street Lamp, Solar Street Light, High Mast Light, LED Flood Light. Through hard working and continuous innovation, we have earned good reputation as one of the larger suppliers in China.
Uknown high pitched 2 tone house noise?
As with anything you have to go through the process of elimination. One evening when you hear the noise shut the house's electric it's quiet at the main. With the main off see if you can hear the sound. If you do not hear the sound with the main off then a speaker or another magnetic electrical device is causing the issue. If the sound continues go outside listen for a transformer or street lamp on a pole many times they will emit a noise when they are in the process of going. If that is not it then listen around the outside of the house to see if you can isolate the noise. As mentioned it could be a gutter or soffit. Or something else creating a reed noise in the wind. Lastly indoors with the electric off check for a pipe vibration noise and attempt to isolate it.
Related rates help! A 6 foot tall woman walking at 4 ft/s away from 24 ft. street lamp. How fast is the..?
If she starts under the lamp her shadow has zero length. In 1 second she will be 4 ft from the lamp. Looking from the side we can see 2 similar triangles - one triangle is formed from the connection of the top of the lamp, the bottom ofthe lamp and the far end of her shadow; the other from the top of her head, her feet and the end of her shadow. From this we can calculate that her shadow will be 1ft 3ins long so the speed at which her shadow will change must be 1ft 3ins in/sec
Why does my body discharge so much electricity?
This happens to most everyone who lives in dry northern climate found in Alaska and some parts of Canada west and northern central tier USA states.But some people do have more natural electricity. Even though I do medical and electronics I do not know the precise reasons why. I have been such a person at times. For example, just turning on lights I far more often than others cause them to burn out. At times I have set off those RFID chip detectors when exiting stores, even when having zero store items on board.I have heard believable stories about people who seem to have effects on street lamps just walking by. In 6th grade in Alaska the thoughtless boys would shuffle across floor (even better with wool sweater) and touch girls behind ear, the effect greatly enhanced with small magnet in fingers. ZAAAP ! Fortunately I became more conscientious and stopped. You would not want zappy unexpected blue spark yourself, but you get one reaching to put key in door at home, touching metal door handle and so on. Shuffling across wool carpet builds up a big charge of static electricity. Kids like experimenting with this a lot until the novelty of it wears off.In my old age I am studying and thinking about used and unused human forces and capabilities. Some of this in answers here. Check out Harry Oldfield stuff for some of the latest new science on that.BEING POLITE: You can discharge YOUR built up Static Charge by touching a metal desk or window frame (or some metal item) BEFORE shaking hands with another person and [Important !] BEFORE touching your computer. Touch the METAL CASE of your PC first, if it has one. Good idea to turn it OFF completely during bad lightning storm too. That is called discharging to "ground" and the electrons go through the ground prong when they leave your PC.Similarly you do NOT want to be wearing a lot of metal items, nor being tallest item about during lightning storm. Get off horse, do NOT stand under tree, nor flag pole, nor street lamp, nor be touching a metal fence ! ! ! The lightning is searching for best connection to "ground" see? Let that pathway NOT be you... The dog with metal chain should be detached from it and taken inside. Standing in mud or on high rocky place or in rain puddle during lightning is also a bad idea. Go inside car, and inside dry house or barn is better. Lightning likes tall items like CN Tower. A very good idea to keep your laptop in a foam lined metal case these days, for reasons I won't detail here. Does no good to protect it from awful damage, unless the metal case is kept completely shut with latch(es) fastened.Why does my body discharge so much electricity?.