Is it safe to sleep in a car with the windows closed?
There is enough ventilation that you wouldn't run out of oxygen. But no, it isn't safe to sleep in a car with windows open or closed.
Can you run out of oxygen in a small room with the door closed?
Even if the door is closed the room, (any common room) is not vacuum tight, so some air keeps getting into the room.However even if we were to design a vacuum tight room, the more imminent danger is the suffocation from CO2 ( which will come way before the decrease in Oxygen level is crtical).The Atmposphere contains about 78% N2 ( Nitrogen) 21% O2, 0.04% CO2 and very small amounts of some other gases.When we breath we obviously breath a gas mixture with 21%O2. However the air we exhale contains about 5% CO2 ( signifcant increase) and 16% O2. So taking an average human breath rate as 8 breaths per minute, and assuming a room size of 3*3*3 m we can calculate the time lapse for the CO2 concentration becomes critical.It turns out that this "critical time" is about 2 -3 days (depnding on what we set as a critical concentration of CO2 in the room beyond which suffocation occurs).Even befor suffocation some unpleasant effects will happen. For example at CO2 concentration of about 4000 ppm ( 0.4%) a feeling of dizzyness wil begin.
If your house was buried in snow would you be able to breathe?
Several feet of snow would loose at least one bar on your cell phone, so perhaps it would not be possible to call or text anyone. The first priority would be to stop the use of oxygen by other than the humans, such as pilot lights, wood stoves and fireplaces. Electric stoves and heaters don't use oxygen, but heat pumps, probably won't heat unless you turn the thermostat to maximum which turns on the heat strips. You have a few hours, possibly as long as 24 hours. A shovel might save your lives, so start digging and scatter the snow as widely as practical though out the house. Snow with lots of surface area, releases some air for you to breath. An attic window that you can open is possibly the best place to start digging as you probably don't know how the deep the snow is until (and if) you escape.
Is it possible to dig yourself out if you're buried alive in a coffin?
The first thing to do would be to stay calm and see how much room you have to move.If you have a way to know it is day time scream a few times every hours, do not exhaust yourself or waist air. (in a lot of TV series these days they put air bottles, you can use a lot less air than you think you need, do not waist it, keep control of your breath)Assuming you can move a little, you should remove your shirt or anything else and put it around your nose and mouth tightly to be able to breath for when (if you succeed) you will have sand/dirt all around and need to digg.Then you would need to read the way the wood of the coffin flows and try to break it in a way the sand/dirt weight will help to break inside while still being large enough to let you out while still not letting to much sand/dirt in. (if you have a knife, carve a long deep line back and forth in the middle from top to bottom, without going through, just to ease the work of breaking the plank).Now push back and forth with the help of the sand/dirt weight until the cover break in half, but don't get burrowed in sand/dirt inside.Keep your tools reachable, do not loose them in the sand/dirt or out of reach.You have to be breaking the coffin while four legged and pushing with your back on the last part because the sand is heavy, you do not want to have sand/dirt all around while laying on your back (the sand weight on top of yourself would be greater and impossible to deal with).It is probably the safest way to be able to hold the weight and pushing back to a large enough breach and be able to be "standing" strong enough to finish digging yourself out.Still that is a pretty bad place to be in.You would have to hope it is not a deep grave and have to do it fast enough while not consuming too much air.
What happens to a body that's buried above ground, in a shrine in a memorial park or something?
I just wonder what happens to the body .. I know it rot under the ground, but does it above the ground too, when the person that has passed is in a casket in a memorial house? Will it rot, become only bones? How long does it stay "in one piece"? Will the body be positioned the same as it was when it was first layed in the casket? Also, is the eyes closed or open? .. I've just always wondered about this .. Thanks, in advance ♥
Where do the maggots thriving on bodies enclosed within coffins go? How do they get there in the first place when no fly has access to a coffin buried 6 feet under?
There is a species of fly, Megaselia scalaris, which actually can and does burrow down six feet under. They're commonly known as coffin flies, and because of the unbelievably small spaces through which they can fit, they are a constant concern in mausoleum maintenance. Bodies which have been embalmed and buried in a casket and vault are much less likely to be consumed by insects or their larvae, though — while decomposition is inevitable, modern burial means it mostly happens through hydrolysis (breaking apart by water, internal or external) and the ravenous appetite of bacteria.
If you were buried alive in a coffin, how long would it take to suffocate?
Just as important than the consumption of the available oxygen would be the toxicity of the increasing concentration of the carbon dioxide that you’d generate every time you exhale.Let’s use the calculation provided by Jack Lipinsky and assume that we start with 820 liters of available air at 400 ppm CO2. A concentration of 100,000 ppm will be lethal in 30 minutes (according to the CDC). That means that if you generated 82 liters of pure CO2 you’d live for maybe another 30 minutes.The average human expels about 2.3 lbs of CO2 per day through breathing (Are you heating the planet when you breathe?) That works out to about 0.1 lbs per hour, which at 1 atm 0C (which is close enough for our calculations) would be 0.023 cubic meters, or 23 liters of pure CO2. Therefore you’d probably die of carbon dioxide toxicity in under 3 hours.Also, once the oxygen concentration is below 6% that would be lethal as well (Minimum Oxygen Concentration for Human Breathing | The Classroom | Synonym) although you’d probably lose consciousness around 10%. Since air contains about 21% oxygen, and others here have calculated that you’d consume all that oxygen in 5.5 hours, you’d get to around 10% concentration in about half the time (just shy of 3 hours) at which point the carbon dioxide toxicity would become problematic as well.