Are wireless signals (e.g. Bluetooth and Wi-Fi) harmful to the human body?
Let's look at this top down:There about 4.3 Billion mobile/cellular phones in use world wide, and there have been over a Billion phones in use since about 2001. Their frequencies are range from 400 MHz (0.4 GHz) to 1.9 GHz, roughly similar to your router.There are about 300 million laptops sold each year, with >90% having 2.4 GHz WiFi. There are roughly 1.2 Billion in regular use world wide, and there have been over 500 million using Wi-Fi the past 5 years.So far, we have not seen any mass epidemics, except for obesity, which is usually attributed to people spending too much time sitting and playing with computers.So the experiment Daniel Helman talks about has been running for some time, with large statistical power (now Billions!) and the results appear to be negative.Parts of the experiment have been running long enough (30 years) that we can put an upper bound on how bad the worse case to be. The worse possible case at this point (early 2012) would be some what bad for a small number of people, probably less that 500,000 out of the Billions.There is not a mega disaster waiting, or it would have already occurred.******In the real world, Microwaves (like 2.4 and 5 GHz) have been known to affect the eyes, being associated with cataracts. One reason you are not supposed to put your head next to a microwave oven and stare at the food.You are very close to the router for a long period of time.> I would suggest you consider moving the router to the other side of the room, or toward your feet, and away from delicate and important systems like eyeballs, brains, ears, etc.That's a low effort precaution.*****Since you live in Los Angeles, where the car is king, here's an idea that might have more "impact" on your personal safety: get a modern car.1959 Chevy vs. 2009 Chevy frontal offset crash...
What happens if police see you on an ATV Quad Bike on the road?
You take the chance of getting a ticket or 2.The atv cannot be registered to ride down the road like a car.If you do that's a ticket-if you don't have a helmet on,that's another ticket.If you don't have an orv sticker on it that's another ticket.Don't believe everything you read,he will chase you,if you run from him,that's fleeing and alluding.If you go into a field or the woods,he may call the local C.O. and he has the right to come onto the property and follow tracks or whatever to pursue you,then they may confiscate or impound the atv along with all the tickets you get.Fleeing and alluding is a go to jail offense.Be smart about it,get an orv sticker and ride with a helmet on the shoulder of the road and you should be ok.
Using resistors instead of inductors in an audio amp crossover circuit?
capacitor resistor combinations are used as high and low pass filters networks, to shape a frequency response i;e you may want sounds up to 50hz amplified 200 times whereas above that you may want to attenuate them as higher sounds are obtuse to the human ear, so in an op amp circuit using a 10k going into a 2.2meg feedback resistor would achieve a theoretical gain of about 220, putting a 1.5 nfd capacitor in conjunction with a 220k resistor above the feedback, could be used to achieve this cut off point and reduce the gain at higher frequencies. be advised that the Xc of the capacitor used would reduce the overall gain down to 155 from the calculated 220 when ac is passed through an inductor the output voltage leads the current by up to 90 dergees, whereas a capacitor has the exact opposite effect. inductors are used in a parallel resonance circuit to produce a very high gain over a narrow bandwidth, it would be useful to see a circuit diagram LC circuit - Wikipedia, the free encyclopedia en.wikipedia.org/wiki/LC_circuit The capacitor stores energy in its electric field E and the inductor stores ... A parallel resonant circuit can be used as load impedance in output circuits of RF amplifiers. Due to high impedance, the gain of amplifier is maximum at resonant ...
What will happen if a DC voltage is given to the transformer primary?
This is what will happen ———-> “BOOM”. Disclaimer: KIDS DO NOT TRY THIS AT HOME!!!Now getting back to the answer : If You were a ninja you'd probably escape that,Now, Looking through a ninja's eyeswhen you supply DC ,at the instant you supply (t=0) , everything will seem normal because initially (@t=O+) at transient period the current will be very small.Now at t= Tc you would see rapid increase in current.it takes approximately 1–2 time constants ( which will be in the order of Milli seconds) to reach the rated current @t= 2Tc approximately.Now at approximately 3Time constants (t=3Tc) your ninja instincts would tell you to move away from the transformer.but why? This is whythe current would increase to such a high value,Because transformers coils will offer negligible impedance to DC supply in steady state (causing a short circuit)now since the situation has gone worse use your ninja reflexes to move far away from the transformer and you may live for the rest of your life.Now from far you'd observe your pretty transformer getting burnt black even before you think of reaching for the supply to plug it out.Hope I answered your question B)