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Question:

physics projectile motion question?

An artillery shell is ?red with an initial velocity of 300m/s at 55.0°above the horizontal. It explodes on a mountainside 42.0s after ?ring. What are the xand y coordinates of the shell where it explodes, relative to its ?ring point? andA ?re?ghter a distance dfrom a burning building di- rects a stream of water from a ?re hose at angle ????i above the horizontal.. If the initial speed of the stream is vi, at what height hdoes the water strike the building?please walk me through it, dont just give answers. i wanna understand this.

Answer:

there is probably a poor air flow in the cellar you cannot smell carbon monoxide so maybe a second more thorough check would be advisable it can leak through brickwork its obviously an old house with a cellar so check the flues of boilers and gas fires
have you tried swapping the CO alarms around. they can become faulty and need replacing over time. if you swap them and the same CO unit keeps going off even after you switched it to a different room, you know its the alarm that's bad get a new one. if you swap them and the alarm continues to go off in the basement/crawl space then you know there is a real problem there
because of the fact that there are no properties at that element of the line, I presume there are no highway lights the two. So, I advise you call your interior of sight regulation enforcement company, clarify to them the area. If there's a fashion so you might have the skill to work out a vehicle going to that element of the line, then you definately call the Police or Sheriff and that they are able to deliver a cruiser to check out the perpetrators. If the neighbor closest to that section sees a vehicle, they could additionally call regulation enforcement. you may evaluate it a community Watch team. it ought to be harmless infants or drug use. Trash is trash regardless of its source.
Two things: CO is lighter than air, only just. CO Alarms require a minimum amount in Parts Per Million (PPM) to fire in the first place. That limit may be met in the basement, but not upstairs, especially if the actual source is in the basement. For now, I suggest you shut down any fuel-fired appliances (water heater, furnace, gas or propane dryer) until your appliances *AND* your flue(s) have been thoroughly checked. Open the doors and windows (if any) in the basement to air things out. Check your flues and see if they may be clogged -AFTER- the airing out. If you have a clogged flue and the means to clear it properly, it may be as simple as that. But CO is colorless, odorless and quite deadly. Continuing exposure to even small amounts can be deadly and will cause permanent damage if it goes on too long.

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