Modern fertilizer manufacturing uses the Haber-Bosch and Ostwald processes to fix aerial nitrogen as ammonia, then oxidize the ammonia to nitric acid. Having already created a Haber-Bosch reactor ...

Nearly 50 years ago, physicists floated a bold idea: our universe might be stuck in a false vacuum. This state feels stable, ...

A new Oxford study shows how physicists made light emerge from “nothing,” offering rare insight into the hidden energy of ...

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Birkenstock sandals, Dyson vacuums, Apple AirPods, and more are included We totally get it — with sunshine at its peak, time ...

This article gives a brief overview of the common vacuum electronic tube amplifiers used in high-power transmitters. Only three types of devices [travelling wave tubes (TWTs) including helix and ...

The next generation of computers could reshape science, security, and global power. It will not be about what’s possible with bits, but about what we can achieve with qubits.

The 6J1 tube is convenient, since it can run on only 6 V (or down to 3.7 as [mircemk] demonstrates). Here it is used as a mixer, with the oscillator signal injected via the screen grid.