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Question:

do dorm smoke detectors detect cigarette smoke?

Hi guys,I was wondering do smoke detectors in college dorm rooms tend to detect cigarette smoke? if it helps, i have a large window I can open, and the smoke detector is quite high up in the ceiling, about 10-15 feet away from the window. Thanks in advance.

Answer:

yes when lightning strikes metal the shock can only go on one side it cant actually go through the metal just around it. as long as u are inside the car and as long as it closed and everything u cant get struck yourself even if the car does.
Yes you would be protected. In order to shocked you must be grounded, meaning that part of your body must be touching the ground in order to complete the circuit. The only part of the vehicle that touches the ground are the tires, and tires are made out of rubber. Since rubber is a resistor, meaning it impedes electricity, the vehicle will not be grounded, and since the vehicle isn't grounded you can't be shocked.
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Not exactly insulated. The metallic skin around the passenger compartment form a conductive cage which diverts any electric field around you rather than through you. So a bolt of electricity hits the top of the car, and passes around the skin to the lowest conductive point of the car, and hops onto the ground. You are unaffected in the car because no electricity goes through you (sames as birds sitting on a high voltage line). However, you are in trouble if lightning hits your car while you are getting out of the car and one foot is on the ground. Instead of jumping through air, it goes through your foot. A lightning rod works the same way. Lightning hits the rod which is connected to a heavy cable that is well grounded into the earth. Lightning hits it and spares the house or building. I disagree with others who say it is the rubber tires. Rubber tire forces the electricity to jump from lowest metal piece of the car onto the ground. If you were ridding on metal rim, you would still be fine. Lightning would just go through that into the ground. I also diagree with touch the metal and you are done. Birds sit on high voltage wires and they are fine. You could be at 10,000 volts but as long as no current flows through you, you are fine.
yes, in general, we may explain this type of incidents by the Faraday Cage event. basicly, electricity/eletromagnetic waves follows the metal surrounding instead of getting inside.you may wanna check pedia or else for more. Now, i remember, i think it was in the enemy of the state movie, thw guys get in to a metal cage to prevent the agency to listen or locate their cellphone, or easier, you might realise that if you're in an elevator your phones signal get significanly weak. i remember a crazy man(was an old video-black and white) wears some kind of bird cage to his head and attaches is strictly to a special costume completely sorrounded by copper wires and gets near to a tesla coil and surely get struck by a lightning. and laughes at the same time!. Just some examples.really interesting stuff; this Faraday Cage :D

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