Stanley Pembroke

 
Member Since August 7, 2011 , From Dallas TX, United States
We learn from history that we learn nothing from history: those who refuse to learn from the past are doomed to repeat it.
About Stanley Pembroke:

Racked-up and now retired archaeologist.  Johns Hopkins University, Ph.D., Mesoamerican and Middle-Eastern Archaeology, 1976.  Dissertation: "Why I hate grave robbers."


Recent Activity by Stanley Pembroke

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Answered: Why isnt the sun and moon set in the same ...

The earth rotates on an axis about 21.9 degrees from the ecliptic plane: that is the orbital track through which the planets travel. More importantly, the Earth travels off the ecliptic in a ...

Answered: Light Speed

I'm an archaeologist, not a physicist, but I will attempt an answer anyway. I only took a few physics courses, so bear with me. As we accelerate a piece of matter to the speed of light, it accretes ...

Answered: Web site where you can see space debris?

"Random orbital objects" (AKA Space Junk) is a nasty problem and it will only get nastier unless we quit littering the sky. There are now so many hunks of junk that satellite engineers must carefully ...

Answered: How does iss avoid perseids

The International Space Station is a joint project by numerous nations, kept under joint ground control by the United States, Great Britain, Russia, Japan, and Australia. There are an estimated 250 ...

Answered: Photocell resistance

I will presume that you refer to photosensitive tubes still in use in labs today. Dynode tubes have sufficient sensitivity to detect a single photoelectron and can boost the signal to a usable value ...

Answered: Germanium diode part number for the Slinky crystal ...

Crystal sets can use virtually any variable inductor, a .01 milifarad capacitor, and a diode. Any PN or NP diode will work, as long as the component is small enough not to "bury" the very weak signal ...

Answered: How many earths would it take for the rest of the ...

It would help you get answers if you posed your question in standard scientific format. Tell us a little about the question you raise. What is the background and previous work done, the results ...

Answered: Cable jointer

Phase converters will turn your single-phase power into polyphase power at the cost of some efficiency. However, if there is no 3-phase power available, the machine you need looks like this. It ...

Answered: Why is scientific notation so important in our ...

Today, we work with far larger numbers than at any other time in history. Which is easier to write: 1,000,000,000 or 10^9 ? Or say, (log)9. If I really want to grate on someone's nerves, I might ...

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