I know that steel and titanium have fatigue limits.
Just to clarify, metals or alloys with fatigue limits are metals that - as long as they experience pressures that lower than the limits - can last "indefinitely".
Aluminum, for example, does NOT have a fatigue limit. No matter how small the...
I know that steel and titanium have fatigue limits.
Just to clarify, metals or alloys with fatigue limits are metals that - as long as they experience pressures that lower than the limits - can last "indefinitely".
Aluminum, for example, does NOT have a fatigue limit. No matter how small the...
What is the smallest amount of electricity (volts, amps?) required in order to create a magnet capable of spinning a 50 grams steel object 150,000 - 200,000 rounds per minute (rpm)?
Phrased another way: What is the smallest electrical engine capable of doing that at the present? 50 grams might...
Sorry for this weird thread.
Say that you throw a perfectly round 10 lb stone rock using a machine with constant force and distance of propulsion.
Can a 10 lb ("average") human head,with full hair about 2 inches long, be thrown -using the same machine - just as far as the 10 lb rock...
Archaeology is a bit of a clumsy tool when it comes proving historical facts. I believe that we can all agree with that.
However, there are some people who are even more extremist in their views and want Archaeology to be of a much lower status.
I am curious if you guys agree with the 2...
Why did these plagues come in waves (Justinian Plague, Black Death of 1347, etc.)? I mean, even when the Silk Road is restricted, the contact and trade never stopped. Rats will always get to be transferred from one end of Eurasia to the other.
Also, I have heard that all of the main Bubonic...
The degree of the Earth's axis has changed throughout history.
If I am not mistaken, I believe that people can make very accurate estimates about the historic degrees of the Earth's axial tilt.
If this is the case, then I would like ask some questions
1. What was the degree of the...
I guess it is both.
My Geography professor told me that latitude and the tilt of the Earth's axis matters more, though. The reason that she gave was that the Earth's orbital path is pretty much a circle; she said that the Earth's orbit is indeed elliptical but the elliptical orbit shown in...
I apologize if this is a stupid question, but I just needed to make sure about something.
Besides latitude and the tilt of the the Earth's axis, the other main determiner of weather would have been land formation, correct?
Just to get it out there, the reason why I believe that land formation...
Objective+Scientific Differences Between "Good"Floods and "Bad"Floods? Need Help
I am always baffled by this problem. The example would be the Yellow River in China and the Nile River in Egypt. Both rivers replenish the soil nutrients with their floodings. However, the flooding of the Yellow...