Jun. 11th, 2003

avram: (Default)

Upped weights in this routine too. It wasn’t as much of a strain as it was with the upper-body workout. One day I’ll need to find a way to add weights to my ab crunches; this will almost certainly involve using a bench. (I think my bed’s too soft.)

Lower-body workout numbers  )
avram: (Default)

Horrifying news: the kilogram is evaporating! That article explains how the kilogram is defined as the weight of a particular cylinder of platinum and iridium, kept in a chateau near paris, and how it’s apparently lost 50 or so micrograms since it was made in 1889, and this could eventually lead to the destruction of the universe. Very amusing, though the author confuses weight with mass.

I figured he was wrong. I mean, we currently define weights and measures by reference to things much more durable than physical object, right? Well, in some cases, yes. Here’re the definitions of meter and second, from the International Bureau of Weights and Measures:

meter
The meter is the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.
second
The second is the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atom.

There’s some defining for ya! Now look at the base unit of mass:

kilogram
The kilogram is the unit of mass; it is equal to the mass of the international prototype of the kilogram.

What’s the deal with that?

April 2017

S M T W T F S
      1
2345678
9101112131415
16171819202122
23242526272829
30      

Most Popular Tags

Style Credit

Expand Cut Tags

No cut tags