Clik here to view.
Diavolo!
Diavolo!This guy is Allo Diavolo:He was a circus daredevil. At the dawn of the 20th century he worked on a number of stunts dressed in his ominous horned outfit. These days a lot of people, including...
View ArticleClik here to view.
A quick contour integral.
A quick contour integral.Note to the reader: this post is relatively stiff mathematically. For those not mathematically inclined, I think you might enjoy reading it anyway and enjoying it as you would...
View ArticleClik here to view.
Longfellow, Wellington, and Coriolis.
Longfellow, Wellington, and Coriolis.I shot an arrow into the air, It fell to earth, I knew not where; For, so swiftly it flew, the sight Could not follow it in its flight. - Henry Wadsworth...
View ArticleClik here to view.
Simple Harmonic Oscillator #1 - Differential Equation
Simple Harmonic Oscillator #1 - Differential EquationFirst of all, happy Thanksgiving everyone! I hope you spend the day happily with the people you care about, and remember to spend a moment or two...
View ArticleClik here to view.
Brilliant Pebbles & A Physics Festival
Brilliant Pebbles & A Physics FestivalIf you happen to be in the Bryan/College Station area tomorrow, you might consider checking out the Texas A&M Physics Festival. It's sort of an open house...
View ArticleClik here to view.
Astrology and Gravity
Astrology and GravityThere's a classic problem in physics textbooks which asks you about astrology. It's sometimes said - the problem will tell you - that the gravitational pull of the doctor...
View ArticleClik here to view.
A train leaves Cleveland...
A train leaves Cleveland...The new academic year is starting, and if there's one thing students love it's a good word problem. If Sue is four times as old as John will be when Sue is one year than...
View ArticleClik here to view.
Solving the Schrodinger equation with a linear potential
Solving the Schrodinger equation with a linear potentialSo consider the one-dimensional time-independent Schrodinger equation:In some ways it's not really an equation as such, because you have to plug...
View ArticleClik here to view.
Quick, hit the brakes!
Quick, hit the brakes!A reader emailed me a fun question from a physics exam he took, along these lines:A car driver going at some speed v suddenly finds a wide wall at a distance r. Should he apply...
View ArticleClik here to view.
How often does the sun emit 1 TeV photons?
How often does the sun emit 1 TeV photons?I had an interesting question posed to me recently: how frequently does the sun emit photons with an energy greater than 1 TeV?All of you know about the...
View Article