There's enough talk about explosives in the media to have a person worried. Not worried enough, it seems, are some people handling the liquid explosive we use every day: gasoline. Understanding the hazards of this substance requires knowing about its physics.
I subscribe to an online wine news service that delivers a couple of times a week some fascinating stories or statistics about happenings in the giddy world of wine. I'm passing along some condensed versions with my own comments.
Owners of cars and two-wheelers like to customize their vehicles, or even rebuild an old one that reminds them of their younger days. Much of the work involves painting, and that's where problems arise.
After a clammy early spring, the sun is back finally. It's going to rise toward its highest point in the sky by June 21, the longest day of the year. Measured as an angle from the ground, in Gainesville the sun will be about 78 degrees up. It can't ever be exactly vertical above us because the subsolar point, where the sun is perpendicular above the ground, doesn't move this far north.