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Amphibious Cars Cruise Amsterdam Canals Before Emissions Ban
Posted in Because I Can, Planes Trains and Automobiles
Vote accordingly.
Obama called us “bitter clingers”
Hillary called us “deplorables”
Harris called us “Fascists” and “Nazis”
Biden called us “garbage.”
Trump calls us “Patriots” and “Fellow Citizens.”
Vote accordingly.
@Mattray4876 (Thank you, your reply to a video was the first time I had seen this.)
Posted in Because I Can, Patriotic
Daylight Savings Time Ends
Clocks turn back an hour at 2 a.m. on Sunday, marking the beginning of standard time for the next few months.
This means that this weekend will be an hour longer than normal, but it will get dark an hour earlier in the evenings.
Standard time will be used through March 12, when clocks will “spring” forward an hour to begin Daylight Saving Time.
Ironically, standard time is no longer the norm. About two-thirds of the days during the year now operate on Daylight Saving Time.
Daylight Saving Time now begins on the second Sunday of March each year and ends on the first Sunday of November.
DST has roots tracing to 1918 in the United States, though not all places always observed it. Currently, it is not used in Hawaii and most of Arizona.
Posted in Anniversary, Because I Can
Welles scares nation
On this day, October 30, in 1938, Orson Welles causes a nationwide panic with his broadcast of âWar of the Worldsââa realistic radio dramatization of a Martian invasion of Earth.
Orson Welles was only 23 years old when his Mercury Theater company decided to update H.G. Wellsâ 19th-century science fiction novel War of the Worlds for national radio. Despite his age, Welles had been in radio for several years, most notably as the voice of âThe Shadowâ in the hit mystery program of the same name. âWar of the Worldsâ was not planned as a radio hoax, and Welles had little idea of the havoc it would cause.
The show began on Sunday, October 30, at 8 p.m. A voice announced: âThe Columbia Broadcasting System and its affiliated stations present Orson Welles and the Mercury Theater on the air in âWar of the Worldsâ by H.G. Wells.â
Read morePosted in Anniversary, On This Day
The Monster Mash
From American Bandstand. October 13, 1964. Bobby âBorisâ Pickett.
Posted in Anniversary, Because I Can, Humor, Music
Today…
In 1886, the ticker-tape parade is invented in New York City when office workers spontaneously throw ticket tape into the streets as the Statue of Liberty is dedicated.
In 1929, the New York Stock Exchange crashes in what will be called the Crash of ’29 or Black Tuesday, ending the Great Bull Market of the 1920s and beginning the Great Depression.
In 1960, in Louisville, Kentucky, Cassius Clay (who later takes the name Muhammad Ali) wins his first professional fight.
In 1969, the first-ever computer-to-computer link is established on ARPANET, the precursor to the Internet.
In 1998, Space Shuttle Discovery blasts-off with 77-year old John Glenn on board, making him the oldest person to go into space. He became the first American to orbit Earth on February 20, 1962.
Posted in Anniversary, Because I Can, On This Day
Mole Day
October 23rd is Mole Dayâyou know, because 10/23 is like 1023.
THE EARLY HISTORY of chemistry has many interesting stories. Just consider the problems scientists had 200 years ago as they tried to figure out some of the most basic ideas of chemistry. It was clear that there were different substancesâfor instance, water is different than coal. But it wasnât so clear what these substances were made of. You could take something like nitrogen gas (N2) and oxygen gas (O2) and combine them together to make another gas (in this case NO2). It thus seemed reasonable to suppose that stuff (molecular gas) was made of smaller stuff (atoms). But the evidence isnât so easy to see. The primary difficulty is that humans canât see molecules or atoms. All the scientific ideas have to be built on indirect evidence.
This is where Amedeo Avogadro comes into the picture (of course his real name is Lorenzo Romano Amedeo Carlo Avogadro di Quaregna e di Cerretoâbut everyone just calls him Avogadro for obvious reasons). Avogadro developed the following idea:
Avogadroâs Law: If you have two gasses at the same temperature and pressure, they will occupy the same volume only if they contain the same number of molecules.
If you are thinking this is just a version of the Ideal Gas Law, you are correctâbut letâs move on to a useful example. Suppose you take water (which is H2O) and run an electric curent through itâcalled electrolysis. This can break the water molecules into hydrogen gas and oxygen gas (which you could collect). If you had these two gases at the same temperature and pressure, the hydrogen gas would take up twice the volume compared to the oxygen gas. Why? Well, when you break up the water molecule, you get twice as much hydrogen as oxygen. Yes, hydrogen doesnât just float around as a single atom. Instead it forms a bond with another hydrogen to make H2âbut oxygen does the same thing (O2).
In the end, you would know that water is made of both hydrogen and oxygen and that there is twice as much hydrogen as oxygen. Thatâs a pretty big piece to the whole elements puzzle and you need an idea like Avogadroâs Law to figure it out.
Avogadroâs Number
But what about this number of Avogadro? Why is it important and why didnât Amedeo know what it was? Letâs start with a definition. If I have 12 grams of carbon-12 (not any other isotopes of carbon) then it would have exactly Avogadroâs number of atoms in it. We can write this number as (approximately):
So we would call this number of carbon atoms, one mole (sort of like 12 eggs is one dozen).
Why is important? Avogadroâs number is sort of like a bridge. It bridges chemistry and atomic physics. In chemistry we measure things based on their bulk properties. Things like mass (total mass), pressure, volume, temperature. However, when we consider these things from an atomic perspective we look at individual atoms and the momentum, velocity of these particles. Avogadroâs number connects these two ideas and allows us to explore atomic-level things by measuring macroscopic level quantities. Itâs a big deal.
But why didnât Avogadro know this number? Because he didnât directly come up with the idea. Chemists named the number after Avogadro to honor his contributions to chemistry.
Determining a Value for Avogadroâs Number
If you had a carton with a dozen eggs, you could open up the package and count the number of eggs to find out that one dozen equals twelve. You canât really do the same thing with a mole of carbon. Carbon atoms are too tiny to see and there are too many to count. We have to find another way to get a value for Avogadroâs number. There are quite a few ways to determine this magic number, but let me go over a simple method.
Start with two pieces of copper placed in a solution of copper-sulfate. When you run an electric current through the system, copper is removed from one plate and deposited on the other plate. This means that one of the plates gains mass and the other loses mass (should be by the same amount).
When the copper atom is removed from one plate, it acts as a charge carrier in the complete circuit (battery, wires, copper, solution). If I measure the current in this circuit and record the time, I can use the definition of current to find the total transfer of charge (which would be the transfer of copper ions).
Letâs put this all together.
- Run current through the copper and copper sulfate.
- Positive copper ions are transferred from one plate to the other making a change in mass (which I can measure).
- I can measure the current and time and calculate the total transfer of charge from one plate to another.
- Since a copper ion has a positive charge of 1 e (charge of an electron), I can get the number of ions transferred.
- Knowing that 1 mole of copper is 63.546 grams, I should be able to get a relationship between the change in mass and the number of molesâwhich will give me Avogadroâs number.
In my rough experiment, I had an electric current of 0.42 Amps for 10 minutes. This gives a total change in charge of 252 Coulombs. Dividing this by the charge of one ion (1.6 x 10-19 C) I get 5.575 x 1021 ions. The change in mass of one plate is 0.344 grams. Thatâs all I need. Now I can write:
Thatâs not a terrible value for Avogadroâs number. Really, itâs not. If you take the accepted value of 6.022 x 1023, then my estimate is just off by less than a factor of 2. I call that close enough. The idea works even if my method was a little bit sloppy. Still, my value is better than no value.
Posted in Anniversary, Because I Can
Vincent Price Performs Thriller!
On Friday the 13th in February in 1987, the legendary Vincent Price showed up as a guest on the Late Show starring Joan Rivers. While on the show, Price performed his classic segment from Michael Jackson’s “Thrillerâ.
Posted in Anniversary, Because I Can, Music, The Little Screen (Television)