[Sunday evening: 3.4 miles; Monday: zero; today: ?]
We had nice dinner at the sushi/hibachi place last night in celebration of a nephew’s birthday. That was a new experience for me; enjoyed it.
But I ate too much and too late in the evening for me, so I woke up about 3:30 AM with stomach rumblings. I checked in on Facebook and email. On email I noticed a message from a running group, the guy was talking about units of measure and how a kilogram is a unit of mass while the pound is a unit of force (something like that).
So the relationship between two masses is that their kilograms stay constant but their force of interaction changes depending on distance due to gravity. Somehow that got me wondering what the gravity inside the Earth would look like. There’s a wikipedia page on that, which talks about the Shell theorem and eventually lead me to something called PREM.
Why is there an upward spike in the PREM graph? That is weird.
I did all of that while lying in bed looking at my cell phone and listening to my stomach rumbling.
Went back to bed and slept for another hour!