Hi,

#2747. What does the noun clavichord mean?

#2748. What does the noun clavicle mean (Anatomy, Zoology)?

Hi,

#6459. If (a - b) = 2 and ab = 99, find the value of

Hi,

#6747. It is sometimes called the Pharos of Alexandria. It is 'One of the Seven Wonders of the Ancient World', for many centuries it was one of the tallest man-made structures in the world. Badly damaged by three earthquakes between AD 956 and 1323, it then became an abandoned ruin. It was the third longest surviving ancient wonder (after the Mausoleum at Halicarnassus and the extant Great Pyramid of Giza), surviving in part until 1480, when the last of its remnant stones were used to build the Citadel of Qaitbay on the site. In 1994, French archaeologists discovered some remains. Name it.

#6748. Name the most populous landlocked country in the world and the second-most populous nation on the African continent. It occupies a total area of approximately 1,100,000 square kilometres (420,000 sq mi), (Actual Land Area : 1,104,300 square km (426,400 sq mi)). It shares borders with Eritrea to the north and northeast, Djibouti and Somalia to the east, Sudan and South Sudan to the west, and Kenya to the south.

Hi,

#2745. What does the noun clatter mean?

#2746. What does the noun claustrophobia mean?

Hi,

#3989. If

104) Tartaric Acid

Tartaric acid, also called dihydroxybutanedioic acid, a dicarboxylic acid, one of the most widely distributed of plant acids, with a number of food and industrial uses. Along with several of its salts, cream of tartar (potassium hydrogen tartrate) and Rochelle salt (potassium sodium tartrate), it is obtained from by-products of wine fermentation. In a partially purified form, tartar was known to the ancient Greeks and Romans; the free acid was first isolated in 1769 by Swedish chemist Carl Wilhelm Scheele. The lees, or sediments, and other waste products from fermentation are heated and neutralized with calcium hydroxide; the precipitated calcium tartrate is then treated with sulfuric acid to produce free tartaric acid. Rochelle salt is prepared from the crude crystalline potassium acid salt, called argol, by neutralization with sodium carbonate. Purified cream of tartar comes chiefly from the filtrates from production of the acid and Rochelle salt. A third salt, tartar emetic (antimony potassium tartrate), is made from the potassium acid salt and antimony oxide.

Three stereoisomeric forms of tartaric acid exist: (1) dextrorotatory tartaric acid (D-tartaric acid) found in grapes and several other fruits, (2) levorotatory tartaric acid (L-tartaric acid) obtained chiefly by resolution of racemic tartaric acid, and (3) a meso or achiral form. Racemic tartaric acid (an equal mixture of D- and L-tartaric acid) is prepared commercially by the molybdenum- or tungsten-catalyzed oxidation of maleic anhydride with hydrogen peroxide.

Study of the crystallographic, chemical, and optical properties of the tartaric acids by French chemist and microbiologist Louis Pasteur laid the basis for modern ideas of stereoisomerism.

The various tartaric acids and the common tartrate salts are all colourless, crystalline solids readily soluble in water. Tartaric acid is widely used as an acidulant in carbonated drinks, effervescent tablets, gelatin desserts, and fruit jellies. It has many industrial applications—e.g., in cleaning and polishing metals, in calico printing, in wool dyeing, and in certain photographic printing and development processes. Rochelle salt is used in silvering mirrors, in processing cheese, and in compounding mild cathartics. Cream of tartar is incorporated into baking powders, hard candies, and taffies; and it is employed in the cleaning of brass, the electrolytic tinning of iron and steel, and the coating of other metals with gold and silver. Tartar emetic is used as an insecticide and a dyeing mordant.

Funny!

* * *
I have given up on my stand up comedy routines. Everybody just keeps laughing at me.
* * *
I think football would become an even better game if someone could invent a ball that kicks back.
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People who want to share their religious or political views with you almost never want you to share yours with them.
* * *
How about we do some peer-to-peer sharing? Your domain or mine?
* * *
Can't throw the ball, kept on bouncing away: situation is out of hand.
* * *
Why should you not make fun of a crippled person? Because he can't stand the jokes.
* * *
How do we know that soccer referees are happy? Because they whistle while they work.
* * *
Nobody works harder than a drunk person trying to carefully whisper a secret.
* * *
When I asked if you'd like to go out on a date sometime, I meant with me.
* * *
A sports expert is the guy who writes the best alibis for being wrong.
* * *
It's funny how one person can make you never trust anybody...
* * *
When there are no volunteers, they get appointed.
* * *
Why do you need a driver's license to buy liquor when you can't drink and drive?
* * *
I think I'm agnostic, but I haven't decided.
* * *
Incompetence knows no barriers of time or place.
* * *

Hi,

#6741. Name the nation which lays claim to be the oldest extant sovereign state as well as the oldest constitutional republic.  It is an enclaved microstate surrounded by Italy, situated on the Italian Peninsula on the northeastern side of the Apennine Mountains. Its size is just over 61 square kilometers (24 sq mi), with a population of 33,562.

#6742. Name the most densely populated sovereign state in the world. It is a sovereign city-state, country and microstate on the French Riviera in Western Europe. France borders the country on three sides while the other side borders the Mediterranean Sea.

Hi,

#2743. What does the adjective classified mean?

#2744. What does the adjective classless mean?

Hi,

The solution #3987 is correct. Neat work, Monox D. I-Fly!

#3988. If sin A = 3/5 and A is an acute angle, find the value of tan A + sec A.

Hi,

#6456. If a = 23 and b = -29, what is the value of

I have given up on my stand up comedy routines. Everybody just keeps laughing at me.
* * *
Sometimes I feel like running away. Then I remember how much I hate running.
* * *
For all the advances in medicine, there is still no cure for the common birthday.
* * *
I was never a photogenic person, because when everyone said cheese I said "WHERE"?
* * *
I hate that feeling after surgery when you're not sure if you're awake or asleep or if you operated on the right patient.
* * *
A wise dog once told me: "Life is like a box of chocolates... it kills you."
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Smart people don't call themselves smart - me included.
* * *
Time is a great teacher, but unfortunately it kills all its pupils.
* * *
Nothing brings neighbors together, like a broken elevator.
* * *
What did the chicken say when it got to the library? "Book book book book book book book..."
* * *
Why didn't the skeleton want to go to school? His heart wasn't in it.
* * *
I may be dumb, but I'm not stupid.
* * *
The first step to causing drama is making sure you tell everyone you hate drama.
* * *
Why can't pigs tell a joke? Because they're such a bore.
* * *
What does a hockey player and a magician have in common? Both do hat tricks!
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