russ_watters's latest activity
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russ_watters reacted to Mark44's post in the thread Point of particular Doonesbury strip? with
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My dad was an officer in the US Army Air Corps in WW II, back before the actual US Air Force was born. He served as a supply officer... -
russ_watters replied to the thread Point of particular Doonesbury strip?.It was founded as and remains a ship-board infantry force attached to the Navy. At the time, Naval combat often involved boarding and... -
russ_watters reacted to Mark44's post in the thread Point of particular Doonesbury strip? with
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All of the US armed forces are voluntary -- Army, Navy, Marine Corps, Coast Guard, and now, I guess, the Space Force. Back in the time... -
russ_watters replied to the thread Point of particular Doonesbury strip?.That's my interpretation as well, but I don't see how it qualifies as a joke. -
russ_watters reacted to berkeman's post in the thread Humans evolved faster after farming, wheels and metal working arose with
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Whelp, we've shot that all to hell more recently... :wink: -
russ_watters reacted to BillTre's post in the thread Humans evolved faster after farming, wheels and metal working arose with
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Rates of recent human evolution have been the subject of threads here several times. Here is a AAAS news article. It is based on this... -
russ_watters reacted to .Scott's post in the thread How Far is Due East From Due West on Earth? with
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"Due east" and "Due west" are directions, not locations. So there is no distance. -
russ_watters reacted to .Scott's post in the thread Graduate How is literally EVERYTHING in physics not binary? with
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The problem with "sharing what you know" is that unless it commonly accepted, you will need citations. Here's an except from the Terms... -
russ_watters reacted to Herman Trivilino's post in the thread Graduate Does a moving particle count as a wave? with
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No. A theory is an attempt to describe the way Nature behaves. The words you use to describe that behavior have no effect on the theory... -
russ_watters reacted to Ibix's post in the thread Graduate Does a moving particle count as a wave? with
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Particles don't necessarily propagate. Physics is an empirical science. A pool ball won't pass through a gap smaller than its size, a... -
russ_watters reacted to Baluncore's post in the thread Undergrad Diodes and low grade thermal energy harvesting with
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Look for HgCdTe (MCT) photodiodes, or LW IR LEDs. Multiply the room temperature dark current, (probably less than 10-9A) by 0.25V to... -
russ_watters replied to the thread Graduate Does a moving particle count as a wave?.The first word of the next sentence of the article is "periodic". I guess what you are implying/asking is whether a wave can be... -
russ_watters reacted to phyzguy's post in the thread Undergrad What are the speed limits of a maglev track? with
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I think a MagLev track on the Moon could launch objects into space. But not on the Earth because of air friction.