A plastic 4-pin base with tipped S-shaped envelope. Donor's card reads: "Full wave rectifier made by the Eveready Raytheon Company about 1929. A gaseous type rectifier without filament or heater, an ...

A plastic 4-pin base with tipless domed envelope. Stamped on envelope: "83". Donor’s card reads: “Full-wave mercury vapor rectifier made by the Radio Corporation of America about 1935 or before.

In the wave of modern technology, high-power wireless charging technology is reshaping the paradigm of energy transmission.

Investors bid up D-Wave Quantum stock in conjunction with the Federal Reserve's move to cut interest rates this week. D-Wave stock also got a big boost from a competitor's new contract with the Air ...

The increasing energy consumption of artificial intelligence is driving new research and investment into clean energy sources, particularly tidal energy. Tidal energy offers a constant and reliable ...

Kiko has dissipated in the central Pacific Ocean but there is a new disturbance forecasters are keeping tabs on. The National Hurricane Center said in an early morning advisory on Thursday, Sept. 11 ...

This 5-month study plan guides CBSE Class 12 students for the 2026 Physics Board Exam, with unit-wise weightage, focusing on ...

Autonaut, an uncrewed surface vehicle (USV) manufacturer and a unit of marine technology company Seiche, both based in the UK, has developed a range of vessels capable of uninterrupted data collecting ...

Chad Hanna receives funding from the National Science Foundation. Scientists first detected ripples in space known as gravitational waves from the merger of two black holes in September 2015. This ...

Kentucky's incarceration rate is high, with jails and prisons operating over capacity. A former judge defends a colleague's controversial shock probation decision, citing legal basis and systemic ...

"GW250114 is the loudest gravitational wave event we have detected to date; it was like a whisper becoming a shout." The Laser Interferometer Gravitational-Wave Observatory (LIGO) is celebrating 10 ...