Mike Meredith

How Long Would It Take To Empty The Oceans With A Teaspoon?

 General, Humour  2 Responses »
Apr 202017
 

Today I pointed out that persuading teenagers to stop thinking “filthy” thoughts is roughly comparable to the task of emptying the ocean with a teaspoon, and someone retorted that the later was possible. Well perhaps, but until we’ve worked out a rough calculation we don’t really know do we?

And yes I am weird enough to have gone ahead and worked it out.

 

 

Swirling Sea

According to the wonder that is Wikipedia, the average teaspoon can contain approximately 5ml of liquid – not often ocean but the type of liquid is irrelevant.

According to a handy table, there are approximately 1.3 billion square kilometres of water in the world’s oceans. And according to a handy units calculator this equates to 1.3e21 litres of water. Dividing this figure by the volume of our teaspoon, we get the value 2.6e+23 teaspoons of water in the ocean.

Assuming that it takes 10s (we could argue about how accurate that is, but trust me it doesn’t make too much of a difference to the final conclusion) to move a teaspoon of seawater into a truly ginormous container that magically appears to contain it all, it will take approximately 2.6e+24 seconds to empty the oceans.

Now you could work on this non-stop, but I’m no Victorian factory owner, so I will be assuming an 8-hour working day, and a 5 day working week. Admittedly no paid holiday (you want pay for this? I don’t think so).

So dividing the stupendously large number of seconds by 60 (to get minutes) by 60 (to get hours) by 8 (to get days) by 5 (to get weeks) by 52 (to get years) we get approximately 3.5e+17 years. Good! We’ve reduced the E numbers somewhat!

Now if we divide this number of years by the expected lifetime of the sun (10 billion years – and ignoring the fact that we’re approximately half-way through the sun’s lifetime), we get a much more manageable figure of 34,722,222 sun lifetimes.

However it is not unreasonable to assume that something will happen to the oceans before we get anywhere near completing this little task.

Breakfast Neglects To Mention William’s Cause: Male Suicide

 General  No Responses »
Apr 182017
 

BBC Breakfast had a story this morning covering Prince William’s struggle with mental health, together with an interview with a counsellor and a mental health patient (both women – and this becomes relevant shortly). All very interesting and worthwhile – those with problems should be encouraged to seek assistance.

Yet what was missing?

The fact that William went public about his need for counselling in support of CALM which is an organisation trying to do something useful about the level of suicide amongst young men.

Whilst generalising the short piece to encourage everyone who needs help to seek it, it seems odd that the mysteriously high rate of suicide amongst young men and CALMs efforts to tackle it should really have gotten a mention.

 

The Myth Of Race

 General, History  No Responses »
Apr 162017
 

I am a racist.

I am prejudiced in favour of the human race.

Of course it is more common to find people who use the word race in reference to sub-divisions of humans, but you usually find that that as you look closer at each sub-division, it has less and less meaning. For instance, “white” in Europe is sub-divided into French, German, Italian, Scandinavian, Birtish, English, Irish, Welsh, … And as you look closer at those sub-sub-divisions, they are also divided up. At the lowest level, there is “family” and “not family”.

The imperative to categorise people into “races” comes from a useful trait for problem solving, but if it doesn’t tell you anything useful, why categorise “race”? There are plenty of more useful categories to put people into.

This was kicked off by a sudden surge in the number of YouTube videos on DNA results that show up for me. Which of course showed the entirely predictable result that almost everyone is a mixture of different ancestors. And people are shocked, distressed, or annoyed about the fact that that their perceived racial identity is smaller than expected.

A DNA test for me will show no shocking results – I know with certainty that all my ancestors for well over 10,000 years were human. As a rough guess, 75% of my ancestors were from somewhere in northwest Europe, with 25% from all sorts of surprising places. The proportions may change, and the higher the proportion of surprising places, the more interesting a story some of my ancestors have to tell.

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