Trying to understand math for Battery resistance ?

Started by in sci.electronics.basics2 weeks ago 2 replies

I=E2=80=99m working though understanding this description in this book. see= attachment link below. I have tried this method for testing...

I=E2=80=99m working though understanding this description in this book. see= attachment link below. I have tried this method for testing household batteries. I know there are = other ways of testing batteries, but really I'm just trying to work my way = through this book as a personal exercise. Please refer to link below for the book example Im trying to follow. The ha= nd written notes are...

Giant Sunspots study by Nicolas Cage - The Knowing (film)

Started by in sci.electronics.design2 weeks ago 11 replies

"The next day, Abby colors in the sun on the engraving, which gives John a revelation. He rushes to the MIT observatory and learns that a major...

"The next day, Abby colors in the sun on the engraving, which gives John a revelation. He rushes to the MIT observatory and learns that a major solar flare with the potential to destroy all life will strike the Earth on the last date indicated by the message. As Diana and Abby prepare to take refuge in nearby caves, John goes to the school and finds the door on which Lucinda engrave

At least four people were shot and killed in separate shootings on Monday afternoon in Half Moon Bay, California, according to California state Senator Josh Becker.

Started by in sci.electronics.design2 weeks ago 1 reply

news.cgtn.com At least 4 killed in Half Moon Bay shootings in California At least four people were shot and killed in separate shootings on...

news.cgtn.com At least 4 killed in Half Moon Bay shootings in California At least four people were shot and killed in separate shootings on Monday afternoon in Half Moon Bay, California, according to California state Senator Josh Becker.The suspect is in custody, accord...

OT: Make the most of your remaining time on this planet

Started by in sci.electronics.design2 weeks ago 15 replies

Not what you're thinking. Not...

Not what you're thinking. Not vaccines! https://www.reuters.com/world/putin-ally-says-wests-deliveries-new-weapons-kyiv-will-lead-global -catastrophe-2023-01-22/ Food for thought, though.

Driving on a rail line with an altitude difference of more than 2,000 meters takes more than carefulness to be a locomotive driver. Huang Qiang in China's Guangxi has his story.

Started by in sci.electronics.design2 weeks ago

Driving on a rail line with an altitude difference of more than 2,000 meters takes more than carefulness to be a locomotive driver. Huang Qiang in...

Driving on a rail line with an altitude difference of more than 2,000 meters takes more than carefulness to be a locomotive driver. Huang Qiang in China's Guangxi has his story. https://twitter.com/i/status/1617751282567229441

Trump May Face 25 Years in Prison, Be Blocked From Future Office: Kirschner

Started by in sci.electronics.design2 weeks ago 96 replies

"The Department of Justice prides itself on exercising independent prosecutorial discretion but they can't turn a blind eye to a coequal branch of...

"The Department of Justice prides itself on exercising independent prosecutorial discretion but they can't turn a blind eye to a coequal branch of government that has done such an exhaustive investigation when they pass all of that evidence over to [the] DOJ and they recommend criminal investigations and prosecutions," he said. "It is great that they're talking about obstructing off

LED Bulb Efficiency vs. Operating Life

Started by in sci.electronics.design2 weeks ago 81 replies

I know it costs more to make a more efficient LED bulb for room lighting. Is there also a tradeoff between efficiency and operating life? I...

I know it costs more to make a more efficient LED bulb for room lighting. Is there also a tradeoff between efficiency and operating life? I can't think of a mechanism, but I'm not so familiar with LED light bulb design. -- Rick C. - Get 1,000 miles of free Supercharging - Tesla referral code - https://ts.la/richard11209

Fake by NewScientist: A blast of ultrasound waves can rejuvenate nothing

Started by in sci.electronics.design2 weeks ago 18 replies

A blast of ultrasound waves could rejuvenate ageing cells Treatment with low-frequency ultrasound has restarted cell division in ageing human...

A blast of ultrasound waves could rejuvenate ageing cells Treatment with low-frequency ultrasound has restarted cell division in ageing human cells and improved physical performance in old mice https://www.newscientist.com/article/2354698-a-blast-of-ultrasound-waves-could-rejuvenate-ageing -cells/

More symbols on keyboards...

Started by in sci.electronics.design2 weeks ago 12 replies

If you really want to sell more keyboards, you should invent a bigger keyboard with more symbols on it, so that programming languages can use more...

If you really want to sell more keyboards, you should invent a bigger keyboard with more symbols on it, so that programming languages can use more symbols. For example: [] {} () Is not enough anymore, need more of this ! =D Bye, Skybuck =D

economics in reverse

Started by in sci.electronics.design2 weeks ago 4 replies

https://www.breitbart.com/europe/2023/01/23/energy-shortages-britons-to-be-paid-to-not-use-elect ricity-between-5pm-and-6pm-on-monday/ I'll...

https://www.breitbart.com/europe/2023/01/23/energy-shortages-britons-to-be-paid-to-not-use-elect ricity-between-5pm-and-6pm-on-monday/ I'll volunteer for that program. There are all sorts of things I'd accept payment for not using. We had a superb dinner last night in the Castro, paid for by Gavin Newsom's \$400 bribery debit card from a state facing a \$24e9 deficit.