On days when there hasn’t been a definite activity that has to be done, or a reasonable challenge to be overcome I have tried to make the activity relevant to the ‘day’. Today is an example of this.

27 is 3 cubed, or 3 x 3 x 3, which is the same as (3 + 3 + 3) x 3. So I decided on of doing 3 activities, each that had ‘3’ associated with it, and doing the whole lot 3 times.

So I started with a 3k walk, then as soon as I got back did a 3 minute plank followed by a 3k exercise bike ride, giving 3 + 3 + 3. Then after a suitable break (which I suppose should have been 3 hours) I repeated the whole lot…then again.

Well, just with numbers that’s OK, but with ‘physics’ doesn’t work. The quantities that physicists deal with all have ‘size’ i.e. a number AND a unit. And you cannot add quantities that have different units. So (3k + 3min + 3k) is meaningless, it cannot actually be done. It like adding 3 apples and three cats, you just have 3 apples and 3 cats, not 6 anything.  Goodnight.




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