The hottest Physics Substack posts right now

And their main takeaways
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Top Science Topics
Everyday Thing 0 implied HN points 05 Feb 25
  1. The EDX-720 is an energy-dispersive X-ray fluorescence spectrometer used to analyze materials by firing X-rays at them.
  2. This kind of instrument has a heavy metal shield because it uses X-rays, making it safe for users.
  3. A lot of pictures of the EDX-720 have been shared, showing its various parts and features.
Kartick’s Blog 0 implied HN points 20 Nov 25
  1. Planes take off and land at speeds between 250 and 310 kph. In places like Bangalore, the altitude makes the takeoff speed a bit faster because the air is thinner.
  2. When cruising, planes fly at around 39 to 41 thousand feet and can travel at speeds of about 800 kph. From up there, you can even see highways on clear days.
  3. Planes begin to descend over 200 kilometers before landing. Once they go below 10,000 feet, it usually takes just over 9 minutes to touch down.
Kartick’s Blog 0 implied HN points 02 Mar 26
  1. Because the Earth rotates, places farther east see night sooner — Bhubaneswar was already dark while Bangalore was still at sunset.
  2. Seeing such moments firsthand turns dry book facts into a living, fascinating experience and makes the world feel full of small wonders.
  3. A core idea of science is verifiability: being able to check a theory's predictions yourself builds trust in those ideas.