Director – Ilya Naishuller. Did you know?
Author: Rauf Aliev
July 18 2018, 22:26
Assembled for educational purposes a buzzer with three operational amplifiers. The first generates a 4 kHz beep, the second – a 215 Hz hum. Both signals are fed into the input of the third amplifier, which buzzes with the mixed signal (visible on the oscilloscope).

July 18 2018, 15:24
A very interesting popular lecture about the collider, atom structure, particles, the discovery of the Higgs boson, etc., by Harry Cliff. Highly recommended for those interested.
July 18 2018, 09:24
Excellent visualization of the fundamentals of quantum physics https://www.youtube.com/watch?v=p7bzE1E5PMY
July 17 2018, 13:05
Robots are replacing humans)

July 16 2018, 08:46
Went to the shower a minute before the alarm on the iPhone. Then, the darn thing shuts itself off only after 15 minutes. And you can’t change that timing! Poor neighbors.
By the way, most likely, this hack will work to prevent someone from hearing the alarm – call exactly at the moment the alarm goes off and hang up right after the connection is made. The phone will manage to say “ah,” but will shut up in the very first second, just like the alarm. This will be especially cool with an alarm tone that starts with soft sounds.
July 15 2018, 20:55
I would use a tall cylinder with a handle, the size of a frying pan, instead of a lid, to allow the hot air to freely rise upwards, while also preventing it from splashing sideways. However, the cylinder is quite bulky. Perhaps there are simpler solutions? (Reducing the flame is not an option, as high heat is sometimes necessary, plus it splashes, albeit not as much, even on the lowest “flame”)
July 15 2018, 20:48
Perfect. Couldn’t find the author. There’s a superb collection in the comments here: https://loony_picture.d3.ru/mona-loony-871050/?sorting=rating

July 15 2018, 20:12
Today, I covered half of Washington, clocking in at 40 km on my bike and 5 km on foot on Roosevelt Island.
Washington is undoubtedly better equipped for cyclists than the average American town. I’d even say that in Washington, things are perfect in this regard, but once you step outside, in the smaller towns, cyclists are pushed to the sidelines. Take, for instance, the Washington & Old Dominion Trail, which is 45 km long and about a half-hour’s drive from my house. Getting there isn’t super convenient, but once you do, it’s like stepping onto a freeway. Occasionally, you plan a route – 20 miles on the bike versus 7 in the car. You immediately start looking for another place.


July 15 2018, 18:42
Planes can land at Reagan Airport literally every minute, while the local metro, unlike Moscow’s, just doesn’t have that capability. Sometimes you have to wait 15-25 minutes for it. How come?
