Unless you are willing take the “Stop it, or I’m turning the hose on you!” approach to parenting (which I think should be open to discussion, but my wife informs me is not, in fact, an option), it is foolish to think that you can actually get your child completely clean once they have eaten a meal. This is demonstrated in the following chart which, I believe, doesn’t require any further explaining.
For those who do feel the need for further explanation…
I’m sure any parent will be familiar with this phenomenon. Your young child finishes a meal… covered in drink, food, and… other stuff that you are just praying is food. So you grab a baby wipe and wipe their face. Then, as you are attempting to wipe one of their flailing hands, the other sneaky appendage reaches up to smear a fresh (although slightly diluted) layer of food onto their face. So you pick whichever bodily part looks the dirtiest, and wipe that… meanwhile, the child rubs the remaining bit of dirt onto the “fresh canvas”.
If this continued, the child would never, theoretically, be 100% clean. I’ve found, however, that it normally ends when you reach the point of “Fine! Whatever buddy, daddy needs to eat HIS dinner”.
Yeah. Being a parent is largely about lowering your standards on what’s an acceptable level of hygiene.
Every time I’m having a bad week, and I’m just a bit over it, life smacks me in the face by making me drive around for 15 minutes looking for a parking space. All that effort, just so that I can be somewhere that I’d rather I weren’t.
But life has a way of balancing things out. In this case, I got a nice graph out of it. Silver linings.
Everyone likes different things, and that’s okay.
The important thing is to recognise that some people will find things interesting, which you have no interest in whatsoever, and vice versa. This is important, and probably very advantageous from an evolutionary point of view. No-one can be an expert at everything, so it helps if we specialise, and if we all liked the same things, no-one would do the other stuff.
All of the foregoing is so that when I say that on my recent holiday I did some recreational maths, you won’t give me a hard time about it. The maths I did is here: Time required to drain a tank
While there are plenty of references for the simplest form of this calculation, what you get here is:
- A complete derivation
- Inclusion of friction losses through fittings and valves
- Consideration of non-atmospheric (pressurised) tanks
- Not having to wade through forum posts of vague queries, unhelpful half-answers, and opinions from people who don’t really understand physics (and probably shouldn’t be on that sort of forum to begin with).
I’ve also updated my menu bar at the top of the page, to try to make some of my questionable content easier to access.
Hopefully soon I’ll make time to do a few more posts, but since that involves actually finishing some of my projects so that I have something to blog about, it might be a couple of weeks before I have anything really interesting to say.