Recent content by Dr. Proof

If she is not concerned about proving her theories with experimental evidence, then she is not a physicist.

Isaac Newton did not measure the gravitational constant. The first to measure the gravitational constant was Henry Cavendish in the late 1700's. http://en.wikipedia.org/wiki/Gravitational_constant

That does not answer my question. My question was: what experiments did he perform?

What mechanics experiments did Newton perform in front of people who doubted his theories?

Physics is an experimental subject. In physics, one can only understand things experimentally. How do you know that objects fall towards the earth? you would have no reason to believe such a thing unless you saw it for yourself. Physics is not about getting a "deep understanding" as you have...

I have searched and searched. I cannot find any record of Isaac Newton performing experiments in mechanics that would have proven his proposed mathematical relations between force, mass, time, and velocity to be true. As far as I have found, Isaac Newton did perform experiments in optics, but...

In mechanics, kinetic energy is the term given to the mathematical formula Fd=(1/2)mv^2. In everyday use, and even when people try to talk about technical things, the word "energy" gets tossed around extremely loosly. Focus on understanding the mathematical formulas by knowing how to derive...

Thanks, jackiefrost. By the way, what is the ISBN for Richard Feynman's 3 volume set titled "Lectures in Physics"? Here are two links to Barnes and Noble's website that will take you to the Feynman's series that I found. Would you please let me know if these are the ones you're talking about...

Amen and Amen.

It's not obvious to me. I think education is a good thing; however, most of our troops that went over-seas in World War II to fight for our freedoms did not have much education. Many dropped out of high school to fight for the very existence of our country. They fought and died by the...

Werg22: You should have read post #6 before you went through all the trouble.:wink::biggrin:

You are absolutely correct D H. All triangles do indeed have a circumcircle. I was absolutely dead wrong to say that there are some triangles that do not have a circumcircle. I am sorry if my statement generated any confusion for you, ady_mech. I thinks it's ironic that I tried to help on...

Be careful. Not all triangles can be circumscribed by a circle. While there is an infinite number of triangles in 3-D space that can be circumscribed by a circle, not all possible triangles can be circumscribed by a circle. It is possible to have a set of three points that cannot be...

go quantum! seems to be going to college for the first time; therefore, it would be to his benefit to take some classes that he is already familiar with. By doing this, he will get a feel for how fast-paced college undergrad math and physics courses are, and he will gain some insight into how...

Mayday! Mayday! go quantum!, have you ever had any experience with college before? You may know some material well, but for God sake man, whatever you do, DO NOT TRY TO PLACE OUT OF ANY CLASSES!. Whatever you do, don't even begin to adopt the naive notion that you can place out of college...