The fans at Fenway got their money's worth tonight!
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Alan Nathan
Профиль VivelyProfessor Emeritus of Physics, U of Illinois. Physics of Baseball: baseball.physics.illinois.edu. Mostly post about baseball. Sometimes Con Law, basketball, physics, WW1, Twilight Zone, ...
I don't think day-to-day fluctuation in Cd is larger this year than in ealier years. What is different is the overall trend seen in the weekly average.
bartparryCan you run game by game cd? By my calc std dev for daily cd is twice as high than anything in a PY? Seems like the CD swing is wild day to day
As far as I know, *nothing* is measured on the balls each game prior to use. Storing balls in the humidor prior to use keeps the environmental factors constant.
Barton L SmithAs far as I know, no one other than me and Lloyd Smith have measured seam heights, and I think we're the only ones to measure widths, and only on about 100 balls several years ago. MLB does not check anything on the balls at the stadium prior to use, I don't believe.
What are you referring to by "these"?
Patrick DufourMy feeling is that there might be seasonal variations in average seam height and width due to shifts in tension in the cotton threads that correlate with some environmental variables (could also be time relaxation since construction). Are these measured for each ball on game day?
One more related graph shows normalized home run rate vs Cd (both monthly averages). The home run rate is controlled for exit velocity, launch angle, and air density (especially temperature), so that these factors do not enter into the rate. Rates are ~20% greater in June,July than in April,May.
Alan NathanJuly update on Cd values, which seem to be trending upward. Fly ball distances for given LA are same in July as in June, with both greater than April and May. I will continue to post monthly update for remainder of season.
Cute! I'm about to start work on a paper for a physics journal, probably AJP, on the physics of torpedo bats. I've learned a lot over the past year and it's about time to write it up.
Dr. Meredith Wills ⚾️⚾️👀Feel like @pobguy.bsky.social needs to chime in.⚾️ 😋
Go to nearby Galena IL where some scenes from FoD were shot. While there visit the home where Grant lived just prior to Civil War.
Jean-Claude Van DamnitSomeone convince me that we should go to this (or convince me that we should not go)
Source: GIPHY share.google/CEeWcl7n8tM2...
The Good The Bad The Ugly GIFs - Find & Share on GIPHYGIPHY animates your world. Find The Good The Bad The Ugly GIFs that make your conversations more positive, more expressive, and more you.share.googleKyle LobnerFilm you’ve watched more than six times with a GIF. Hard mode: no Star Trek, Star Wars, LOTR, Marvel, Disney, or Ghibli.
And Bill Russell has more rings than fingers.
Sky KalkmanMichael Jordan is better than LeBron James because he has six rings. Robert Horry is better than Michael Jordan because he has seven rings.
The last time the Red Sox won 15 straight, my mother was pregnant....with ME
Jen McCaffreyFenway Park was 34 years old. A 6-year-old future Hall of Famer named Carl Yastrzemski was just picking up a bat. World War II had just ended. It was 1946, and that was the last time the Red Sox had a 15-game winning streak. On a franchise milestone: www.nytimes.com/athletic/746...
I have also visited Fort Necessity several times, Jumonville Glen (named after the French commander) where the first shooting occurred, and the site of the Braddock battlefield.
Alan NathanJust saw Young Washington and enjoyed it. I was very familiar with the storyline, having read extensively on it. Among my favorites: 1. Young Washington by Peter Stark 2. George Washington's First War by David Clary 3. Braddock's Defeat by David Preston, which I especially recommend.
Just to remove any possible confusion, an ICE car is one with an Internal Combustion Engine. Among EV owners, to get "ICE'd" is to be blocked from a charging station by a illegally parked ICE vehicle.
Alan NathanWith my Tesla M3, I average 0.23 kWh/mile while charging at home for $0.12/kWh. That means my cost is $0.028/mile. Compare to ICE car getting 30 mpg at cost of $4.00/gal, for a total of $0.133/mile or nearly 5x worse than the Tesla.
With my Tesla M3, I average 0.23 kWh/mile while charging at home for $0.12/kWh. That means my cost is $0.028/mile. Compare to ICE car getting 30 mpg at cost of $4.00/gal, for a total of $0.133/mile or nearly 5x worse than the Tesla.
Sky KalkmanLord of factors, but EVs effectively get 100-120 mpg going by cost. Probably more currently given price of gas Of course, mpg increases are non-linear, like ERA+. Really should be using gallons-per-mile.