# Silver Conversion Chart: Troy, Metric, and U.S. Coin Information

I’m most likely to need the information in the top third of this chart, myself, but I continued it all the way through 100 kg, for the benefit of those with much more money to invest in silver than I have.

How much does silver cost, per troy ounce? Right now, it’s in the \$15 neighborhood, but that changes all the time. This is the website I use to keep an eye on the “spot” price of silver, but there are many other such sources, as well.

# “How Tall Are You?”

When I am asked for my height, anywhere — especially at school — I answer the question honestly. I am 1.80 meters tall.

I also live in the USA, one of only three remaining countries (the other two holdouts are Liberia and Myanmar) which have stubbornly refused to adopt the metric system. However, I am every bit as stubborn as other Americans, but, on this issue, I choose to be stubborn in the opposite direction.

It should surprise no one who knows me well that my classroom, whether I am teaching science or mathematics, is, by design, an all-metric zone. After all, like >99% of people, I have ten fingers (assuming thumbs are counted as fingers), ten toes, and almost always use the familiar base-ten number system when counting, measuring, doing arithmetic, or doing actual mathematics. (Doing arithmetic is not the same thing as doing real mathematics, any more than spelling is equivalent to writing.) Using the metric system is consistent with these facts, and using other units is not.

Admittedly, I do sometimes carry this to an extreme, but I do so to make a point. Metric units are simply better than non-metric units. Why should anyone need to memorize the fact that there are 5,280 feet in one mile? It actually embarrasses me that I have that particular conversion-factor memorized. By “extreme,” I mean that I have been known to paint the non-metric side of meter sticks black, simply to make it impossible for students in my classes to confuse inches and centimeters, and prevent them from measuring anything with the incorrect units.

To those who object that American students need to understand non-metric units, I simply point out that there are plenty of other teachers who take care of that. This is, after all, the truth.

Often, after giving my height as 1.80 meters, I am asked to give it in other units. Unless the person asking is a police officer (in, say, a traffic-stop situation), however, I simply refuse to answer with non-metric units. What do I say, instead? “I’m also 180 centimeters tall. Would you like to know my height in kilometers?”

If pressed on this subject in class — and it comes up, because we do lab exercises where the height of people must be measured — I will go exactly this far:  I am willing to tell a curious student that there are 2.54 centimeters in an inch, 12 inches in a foot, and 3.28 feet in a meter. Also, I’m willing to loan calculators to students. Beyond that, if a student of mine really wants to know my height in non-metric units, he or she simply has to solve the problem for themselves — something which has not yet happened. I do not wish to tell anyone my height in feet and inches, for I do not enjoy headaches, and uttering my height, in those units I despise, would certainly give me one. Also, obviously, you won’t find my height, expressed in non-metric units, on my blog, unless someone else leaves it here, in a comment — and I am definitely not asking anyone to do that.

I might, just for fun, at some point, determine my height in cubits. For all I know, a person’s height, measured with their own cubits, might be a near-constant. That would be an interesting thing to investigate, and my students, now that I’ve thought about the question, might find themselves investigating this very issue, next week. The variability of cubits, from one person to another, makes them at least somewhat interesting. It also makes cubits almost completely useless, which explains why they haven’t been used since biblical times, but that’s not the point. One can still learn things while investigating something which is useless, if one is sufficiently clever about it.

Feet and inches, however, are not interesting — at all. They are obsolete, just as cubits are, and they are also . . . offensive. It is not a good thing to insult one’s own brain.

# Another Modest Proposal (with Apologies to Swift)

The day on this planet is 84,600 seconds long. That’s not far from 100,000 — so we could shorten the second a bit, call it something else, and get 100,000 of them each day to create a decimal clock. 100 of these “jiffies” could make a “stretch,” and then 100 “stretches” could make a deciday (the new version of an hour). Ten decidays, of course, make a day, so these neo-hours are pretty long, compared to the hours we’re used to experiencing. This is just practice for making an improved 10-month calendar, of course.

Why go to all this trouble? To get rid of astrology forever, that’s why!

## News Flash: Big Snake on the Loose in Texas

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This just in from Longview, Texas — a five-meter (~16 foot) Burmese Python is on the loose.

If you see it, do not approach.

Retreat and dial 911.

No kidding.

Also: learn the metric system.

## How Far Have I Traveled?

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Earth’s average orbital speed is a mind-blowing 108,000 kilometers per hour — fast enough to travel one earth-diameter in just seven minutes or so. At that speed, surviving on this ball of rock for 46 years, as of today, means that I have traveled roughly 43 billion kilometers in my lifetime, just due to earth’s motion around the sun. Also, by the way, NO, I will not convert this speed, nor this distance, into those annoying non-metric units!