#safety
Questions about “safety”.
3 articles
What is the white fog from dry ice?
Drop the dry ice from a cake box into water and white smoke comes billowing out. It certainly looks like a cloud of carbon dioxide. But is it?
Was the three-point seat belt patent free to use?
The first thing we do in a car is click the seat belt shut. Where did that familiar diagonal-plus-lap design come from, and how did it end up in cars all over the world?
Why don’t elevators fall?
In the movies, an elevator whose cable snaps plunges straight down the shaft. Real elevators, though, carry on a trick invented more than 170 years ago.