No, it is when not charging you need to worry. When charging odds are you are there and so if it starts to burn you will smell it and take action before it starts a larger fire. When you are not charging you might not even be home and thus the fire will spread.
When things are normal the charger will not burn. When something goes wrong you have to worry. Most of the time you are not charging.
100% is the typical claimed number as it is easy to measure watts of electric in and find that is exactly equal to watts of heat out - or if not the difference is easially explained by measurement error. There is no hypothesis (much less theory!) of where the energy could go it it isn’t heat and conservation of energy is enough to also decide 100% efficient.
The above isn’t the whole story though. If you could somehow measure watts from the power plant output you would discover that 4-12% (depending on a bunch of factors) of the energy is lost before it even gets to your house and so your efficiency goes down. If you measure fuel into the power plant, those range for 10% (old systems from the 1920s only run in emergencies) to 60% (combined cycle power plants) - I’m not sure how you would measure wind and solar. Eventually the universe will die a heat death and 0% long term.
I have had to do that - so now you have heard of someone… My house was built in 1973, some of the outlets in locations I believe previous owners would have plug/unpluged often have worn out, and thus I had to replace them. (think kitchen appliances or vacuum cleaners - the same outlets I’m using all the time). There other other outlets that still work, but they don’t grip plugs as well as they should anymore and I am planning to replace. Despite the above, the vast majority of outlets I’ve replaced have been perfectly fine, but with young kids around I wanted modern TR outlets anywhere the kids are likely to be playing.
when you fire a gun scratches are left on the bullet that are enough of a unique fingerprint to trace to the gun.
Regaurdless, safe drivers always park so they drive out. you have much better visibility driving out than backing out which means you are less likely to run over something you didn’t see. By backing in you had to drive past and thus had time to verify nothing was there.
There are many many different people with different advice. Just do a search in any engine, eliminate the AI-slop and use what of the rest seems like you can do.
The most important factor is putting in your hours of study. You can never learn a language if you spend all your time learning how to learn a language. You will never learn a language if you good at one basic and never study anything else (which is what most programs, including doulingo will get you, so you need to try several different study methods)
Night vision goggles have existed for decades by now. You can buy them retail if you look (may need to look hard - Ukraine is using a lot of them and may be taking up all supply)
an assembly line that can make 2 per year still qualifies as mass production. At the level of people who can afford a million you can’t sell more than a couple per year anyway. There are a few car companies that have production numbers in that range.
Unplugged vs plugged in is moving the goal posts. I agree that a device that isn’t plugged in is less likely to start a fire (while not impossible, it is very very unlikely), but that is a different situation.