# Chapter 33: Let it Roll, the Characteristics of the Rotational Dimension

How much thought have you ever given to gyroscopes? A gyroscope is a device that is made to operate by spinning a mass (generally, a round slightly tubular or wheel-like object) at a constant speed on a stable axis. We use them for a number of items: toy tops (of course), flywheels, centrifuges, bicycle and…

# Chapter 32: The Linear Dimension

As humans, we are inextricably caught between the large and the small. We are much too small to capture the wonder and size of the cosmos. Oh sure, we have developed powerful telescopes that we can use with clever techniques to get keyhole sized views of the universe in the distant past. Because the speed…

# Chapter 31: The Three Accelerations and Einstein’s Elevator

The fundamental assumption for Dr. Einstein’s  triumphal paper on General Relativity regards the equivalence of gravitational mass and inertial mass. It is so basic, so fundamental that it has come to be regarded as one of the basic building blocks of all Science and reason, and has become one of the most stalwart principles in…

# Chapter 30: New and Improved! The Three Dimensions

I remember the moment very clearly. It was in the fall, in the Great Lakes region of Ohio. The leaves were starting to turn, making the wooded area surrounding our porch into a mad palate of varied colors and hues. Fall is a particularly beautiful season in the upper Midwest, and this one was no…

# Chapter 29: What is a Dimension, Anyway?

Webster says: “Dimension (in the general sense): an element represented in an equation by a symbol that functions analogously to symbols representing the three spatial dimensions and regarded as a constituent of a geometric space” Whew! That’s a mouthful. To be truthful, I thought that I’d try to come up with a definition of my…

# Chapter 28: Finding the Center

Where is the center of the universe, and what does it look like? Astronomers will say that that at this point in time there is no true center of the universe, and there is good reason for that. If the universe did begin with the Big Bang some 13 or 14 billion years ago, that…

# Chapter 27: The Choice of a Yardstick: What Einstein Really Meant

“The speed of light in a vacuum is constant.”  “The speed of light in a vacuum is constant.” It is interesting to look back (well actually, you don’t have to look too far back) to see what standards have been used for measurement units. Currently, the standard for the US/English/Customary system is the ‘foot’ which…