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Did the police use taser or similar weapon in 1950 or in 1960?
As far as we know, police only used guns or batons, back then...
Can you turn your analog police scanner digital with a converter box?
No, a television converter box will not work on a police radio scanner. There is currently no way to make this conversion. One cost-effective method of listening to digital police, fire and other communications without purchasing a digital police scanner is through the download and installation of a free smartphone application which receives digital transmissions. There are many available for both Android and iPhone.
What is impeding an investigation?
One must actively provide false information to the police during investigative questioning. Merely choosing to remain silent doesn't rise to the level of a violation of impeding.
What is the lowest voltage that can kill you?
Voltage doesn't harm you. Current does. If you can sufficiently reduce the resistance at the points where the power supply connects to your body, you can do yourself a lot of harm with a very small voltage. I am an electrical engineer. We were discussing this exact question in the engineering dorm, on a night more than 50 years ago that I can never forget. A debate got going over whether it's possible to kill someone with 12 volts. Some said yes, some said no. A very stupid proof of concept was proposed, and played out to its unfortunate conclusion. A method of low-resistance connection was proposed, and one of those who said it couldn't be done bravely demanded to be the one to demonstrate it, and show everyone else that it couldn't be done. The power source selected was a 12-volt car battery, the means of connection are better left not described, and for the rest of the night, each of us in the group was interviewed privately, one at a time, by the police, after his body was removed from the dorm. So I'll say: less than 12 volts, if you know how to do it.
How did invention of the electric light bulb change the environment?
You can see without a fire, or burning candles, oil lamps and lanterns, which can be dangerous left unattended. Also no need to wait for daylight to do all the work that we wish to do. We can work indoors in bad weather, even on small detailed tasks, and homes can be built with smaller/fewer windows to conserve energy. We can make plans to complete jobs, and they don't depend on daylight hours, or sunny weather to complete them, especially fine detailed work that requires clear sight. People can work all hours of the day and night, keeping hospital, or medical services, and police, or security services available to those who need it. One's life and work in general don't revolve around the time of day, and what the weather, or season may provide in the way of illumination.
