Today was the start of Ramadan, the most holy month of the Islamic year. To coincide with the start of the month, King Abdullah bin Abdulaziz Al-Saud set ticking the clock on the highest peak of the Abraj-ul-Bait Towers.
The clock faces measure 141 feet in diameter, compared to 22 feet in diameter for Big Ben. Rather than levering the entire weight of a 50-foot hour hand or 70-foot long minute hand on the hub, the distant tip of each clock hand is supported by a guide built into the clock face that moves the hand along on a track. (This means that the outer tip of the minute hand moves along at a swift inch and a half per second.)
What Type are You? is a quick “personality test” that determines which modern typeface best suits you. I’m a bit of a typography nerd, and so I jumped at the chance to determine my font archetype. (Archetypeface?)
For the record, I was Courier.
But what most impressed me about this exploration is that architecturally, it’s the exact same as an OkCupid quiz. Four binary questions, with sixteen ultimate possible answers. The format Pentagram used for their little lark of a test is Flash video, hosted by an engaging European “psychotherapist” who seems to react to your answers.
The structure is the same as a LiveJournal meme. The presentation is entirely different.
In all our affairs (business, school, family), this is a great reminder how putting in an extra bit of effort can make that which is ultimately a simple task that much more enjoyable for the doer.
This is what separates a wildly successful firm such as Pentagram from that freelancer in his basement. Or, put another way: if the freelancer put together an effort like this, how much more business would he be able to rake in?
Whether an object sinks or floats depends on the densities of the submerged object and the surrounding fluid (liquid or gas). If the object (in this case the cannonball) is denser than the fluid (mercury), it sinks. Otherwise, it floats.
In the rare case that the two densities are equal, the object is “neutrally buoyant.” That is, it just hovers without moving up or down. Think of a days-old helium balloon.
Mercury is very dense, even for metals. Its density is 13.6 times that of water. Compare that with other metals we think of as “heavy” — iron (7.9 times as dense as water), copper (9 times water), or lead (11.3 times water). So even a solid brick of lead would float in this dear professor’s pool of mercury.
I would love to travel to the Dead Sea, for the opportunity to float on this body of salt water. I imagine I’d be as happy as this guy:
Salt water is more dense than fresh water (due to the salt, duh). That difference in density (only about 3%!) is enough to cause humans to be much more buoyant in salt water than in fresh water. In fact, I hear that it’s even difficult to swim in the Dead Sea because your added buoyancy is actually pushing you out of the water!
We could do some really cool things if mercury weren’t so horribly toxic to people. You would literally float so high on the surface of the pool of mercury that viewed from the side it would look like you were lying on a piece of plywood. It might even be possible to stand on a vat of mercury. Imagine if you only were submerged up to your ankles, or perhaps your mid-calf? You’d float while standing! (Staying upright might be possible, but walking might not be as easy as you’d think. There would be no friction keeping your feet stationary. They’d move side to side, and the mercury would feel as if you were walking on very slippery ice.)
Don’t try this at home, kids. Mercury’s bad for you. So if you happen to bump into this professor someday, don’t ask to play in his pool of mercury.