Day: June 23, 2015

I think I stumbled across this a while back but I can’t remember where. The classic freshman physics question is, assuming a uniform density for the Earth and a perfect, frictionless tunnel cut through the Earth in a straight line, how long would it take to travel between any two points on the surface of …

Gravity Tunnels, Falling through the EarthRead More

I’m trying to catch up on my reading by skimming through back issues of American Journal of Physics when I found this one in the March issue: “Impact behavior of a superball,” Am. J. Phys. 83, 238-248 (2014). It’s a fun little article that covers some of the basics that you can find elsewhere like how the …

Superball Physics!Read More