Archive for the 'Physics' Category

A ride on the vomit comet

Wednesday, May 3rd, 2017

Three YouTubers on a zero-g flight:

Physics Girl: Zero G Ferrofluid Fail. (10:48min)

Veritasium: Fire in ZERO-G!! (7:47min)

e-penser: Vol en zéro-G. (35:26min) This one is in French, but English subtitles are available.

This looks like so much fun! I would accept an invitation in a heartbeat, since tickets usually cost several thousands of dollars…

“Trump […] talks of helping ordinary Americans even as he enriches tycoons like himself.”

Friday, April 28th, 2017

New York Times Opinion by Nicholas Kristof: This Isn’t Tax Policy; It’s a Trump-Led Heist.

“What do you do if you’re a historically unpopular new president, with a record low approval rating by 14 points, facing investigations into the way Russia helped you get elected, with the media judging your first 100 days in office as the weakest of any modern president?

Why, you announce a tax cut!

And in your self-absorbed way, you announce a tax cut that will hugely benefit yourself. Imagine those millions saved! You feel better already!

I’m deeply skeptical that President Trump will manage to get a tax reform package passed into law, and that’s just as well. Trump’s new tax “plan” (more like an extremely vague plan for a plan) is an irresponsible, shameless, budget-busting gift to zillionaires like himself.

This isn’t about “jobs,” as the White House claims. If it were, it might cut employment taxes, which genuinely do discourage hiring. Rather, it’s about huge payouts to the wealthiest Americans — and deficits be damned!”

Ein virtuelles Oszi!

Friday, April 21st, 2017

XXY Oscilloscope is an interactive oscilloscope emulator by Neil Theipen. This is fun to play with!

Link via MetaFilter: something something oscilloscope your ocelot.

Mission Control

Wednesday, April 19th, 2017

The Guardian: Apollo 13: celebrating the unsung heroes of mission control. “Ahead of a new documentary about Nasa’s ground crews, astronaut Jim Lovell talks about the team that saved his life during 1970’s ill-fated moon mission”.

“It is unlikely there is anyone who has more appreciation for the work of Nasa’s mission control than Captain Jim Lovell. His Apollo 13 mission was nearly destroyed when an oxygen tank in its main command module exploded. His spaceship was crippled and only narrowly coaxed to a safe return to Earth thanks to his crew’s heroic efforts – and the crucial aid of mission control.

Lovell was commander of Apollo 13 but was forced to abandon his mission’s planned lunar landing when the blast, which occurred 200,000 miles from Earth and two days into its journey in April 1970, triggered a major loss of power. Cabin heating stopped working, the water supply was disrupted and carbon dioxide began to build up. Lovell and crewmen Jack Swigert and Fred Haise were facing death.”

The movie is available here on demand.

Link via Garret.

Tick tock

Thursday, March 9th, 2017

Here’s how to turn an old hard drive and some LEDs into a clock: LED Hard Drive Clock 3.5″ by Ian Smith. Take a look at his demo video (YouTube, 3min)

Don’t be put off by the year-10,000-compliant website design. One of my students built a clock like this and it is just about the coolest thing I’ve ever seen!