Recent content by Rocky9242

What you are interested in is "isostacy" and http://en.wikipedia.org/wiki/Isostacy "gravity anomalies." http://en.wikipedia.org/wiki/Gravity_anomaly The usual analogue is blocks of wood floating on water. The upper surfaces of thinner and denser blocks of wood, say ebony, are closer to...

I _really_ don't understand this slice business. I thought space was expanding at the rate of the Hubble Constant. If space is not really expanding, what is the explanation of red shift? Saying that our past selves continue to exist and our future selves already exist is a non-scientific...

Maybe we need an inflatable potato chip.

http://www.missingpetpartnership.org/recovery-tips/lost-cat-behavior/This']http://www.missingpetpartnership.org/recovery-tips/lost-cat-behavior/[/PLAIN] This website may have everything there is to know about recovering lost cats. Usually, cats go less than two miles. Your case is...

A lot of animals have evolved rotary bearings. It would not be much of a stretch from there to place a wheel on the end of that axel. Some animals make themselves into "wheels" (or balls or something) that can roll downhill. This Wikipedia article has a good discussion of these structures...

>>Apart from a big brain, we have lost most anything else that is considered 'advancement', we are weak, slow, don't see or smell well, we can't run fast or that far. Apparently, we can run "that far." See this Wikipedia article on "persistence hunting:"...

During the Mercury and Gemini space programs and as planned for Apollo 1, NASA used 2 lb/in^2 of pure oxygen for the atmosphere. To run a simulation for Apollo 1, they pressurized the capsule to 2 lb/in^2 above the atmospheric pressure, or about 17 lb/in^2. Since the capsule was set up to use...

Agreed. A person wishing to use the ingredients in these proportions would have to know how to cook them.

In the US, food products have an ingredient list and a "Nutrition Facts" panel. The ingredient list lists all ingredients in order from most abundant to least abundant, e.g. "flour" would be the first ingredient for bread and "salt" would be further down the list. The Nutrition Facts shows...

The way to find things like this on the Internet is to search for: physics demonstration experiments or physics classroom demonstrations and maybe add the level of the students, e.g. high school.

There are many ways this could be done. Have them measure the thickness of the textbook and calculate from that the thickness of a single page. Averaging 20 or 30 of these measurements will give you a very accurate estimate. Measure the "real" thickness with a micrometer. Give each student...