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nostupidquestions

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If I have a combination smoke, CO and flammable gas detector, how do I test each component separately?

The fire alarm system at my house is handled entirely by our property manager as it is semi-attached housing, so we have a centralised fire panel for all the houses. We only have two hockey puck shaped sensors on the ceiling of our house, one on each floor, and that’s it in terms of safety sensors. We have gas fired appliances...

Are there really no stupid questions?

If we for instance take, as an example, someone thoroughly explaining something which is clear to 99,9999% of the earths adult population don’t you think the remaining .0001% could come up with some? I get that this community is a place to allow people to ask questions they can’t or won’t ask elsewhere but I certainly feel...

Are there actually blind people without pupils, or is that a Hollywood thing?

A lot of movies, especially horror movies (I’m watching one now) depict blind people as not having pupils. But my understanding, based on blind people I’ve met, is that the problem is usually in the lens or the retina, and that they have pupils the same as everyone else. Are there actually blind people out there whose eyes...

What is the reason for the image of a camera to look further away than the same scene through my own eyes when I have the camera arms length away and closer to the thing I'm looking at?

So I’m sitting here looking at a black widow on my porch and it’s a big fat fucker. I wanted to take a pic but I don’t want to get too close. Yet the image my camera picks up looks like I am trying to snap the pic from the opposite wall of the porch when I’m only about 2 feet from the spider. Why is that?

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