Here's what will happen: the car announces "the light coming up will turn yellow in 3 seconds", so the driver hits the accelerator to beat the light. Driver in crossing road is told light will turn green in 3 seconds, so they don't bother to slow down for the intersection...
To add to the problem, when thrift stores can't sell the massive supply of donated clothing they receive, they ship it off to third-word countries, where the arrival of free things like t-shirts suppresses the native businesses of growing cotton, making cloth, designing clothes, etc.
This absolutely works on shower heads and kitchen nozzles. The vinegar also works on that black crust that forms in the toilet outflow tract that looks like fecal stain but is just calcium and probably iron for the color and is resistant to the typical scrub brush. What you need to do is shut off the toilet water from the wall, then flush to remove most of the residual water in the bowl, then scoop out the rest with a plastic cup (so the vinegar won't get diluted) and then pour in half a jug of vinegar (it's cheap) and let it sit overnight, then scrub with the brush. Repeat as necessary. This may be TMI but it's the sort of information you don't learn in school and eventually need for adulting.
No no no. "800 percent" is not 800 times. 800 percent is 8 times, just as 100 percent is one times. Water is not 8 times as dense as air. A heavy gas might be 8 times as dense as air and sink to the floor of a room. Water is about 800 times as dense as air.
"Water has a density of 1000 kg/m^3. If you had a meter cubed of water it would weight about 1000 kg. Air that is near sea level has a density that averages 1.275 kg/m^3. If you have a balloon containing a meter cubed of sea level air, the air itself would weight only 1.275 kg. Therefore, to find how much more dense water is than air all we need to do is find a ratio of water to air. 1000 kg/m^3 divided by 1.275 kg/m^3 yields 784. Therefore, at sea level, air is 784 times less dense than water. Expressed in another way, a volume of air at sea level has 0.1275% of the density of the same volume of water. "
https://www.thisamericanlife.org/354/mistakes-were-made
http://tywkiwdbi.blogspot.com/2013/11/can-someone-identify-partially.html
https://www.theatlantic.com/video/index/603451/overtourism/
"Water has a density of 1000 kg/m^3. If you had a meter cubed of water it would weight about 1000 kg. Air that is near sea level has a density that averages 1.275 kg/m^3. If you have a balloon containing a meter cubed of sea level air, the air itself would weight only 1.275 kg. Therefore, to find how much more dense water is than air all we need to do is find a ratio of water to air. 1000 kg/m^3 divided by 1.275 kg/m^3 yields 784. Therefore, at sea level, air is 784 times less dense than water. Expressed in another way, a volume of air at sea level has 0.1275% of the density of the same volume of water. "