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#1 Re: Ganesh's Puzzles » Oral puzzles » Today 00:16:09



#4119. If a straight line passes through a point (2,-5) and its slope is -3, find the equation of the straight line.

#2 Re: Ganesh's Puzzles » 10 second questions » Today 00:09:51


#6585. The sum of two angles of a triangle is 116 degrees and their difference is 24 degrees. Find the measure of the smallest angle of the triangle.

#3 Re: Ganesh's Puzzles » Series and Progressions » Today 00:03:14



SP#393. If the sixth term of a Harmonic Progression is

and its tenth term is
, find the first term of the Harmonic Progression.

#4 Re: Ganesh's Puzzles » Mensuration » Yesterday 23:55:29


M # 326. A hollow sphere of internal and external diameters 4 centimeters and 8 centimeters respectively is melted into a cone of base diameter 8 centimeters. Find the height of the cone.

#5 Re: Help Me ! » Please help explain math expansion » Yesterday 21:16:18

Hi Mathando,

Introduction to Derivative.

The slope formula is:    

Put in

Simplify more (divide through by Δx):    = 2x + Δx
Then as Δx heads towards 0 we get:    = 2x

#6 Re: Ganesh's Puzzles » Doc, Doc! » Yesterday 15:22:20


#1270. The skull is a bony structure that forms the head in vertebrates. It supports the structures of the face and provides a protective cavity for the brain. The skull is composed of two parts. Name them.

#7 Re: Ganesh's Puzzles » English language puzzles » Yesterday 15:14:47


#2975. What does the noun coupé mean?

#2976. What does the noun couscous mean?

#8 Re: Ganesh's Puzzles » General Quiz » Yesterday 15:01:19


#6987. Name the longest road tunnel in the world succeeding the Swiss Gotthard Road Tunnel. The tunnel carries two lanes of European Route E16 and represents the final link on the new main highway connecting Oslo and Bergen without ferry connections and difficult mountain crossings during winter.

#6988. Where is the 'San Diego Zoo'?

#9 Re: Ganesh's Puzzles » 10 second questions » Yesterday 14:36:42


#6584. Find the value of

find the value of

#10 Re: Ganesh's Puzzles » Oral puzzles » Yesterday 14:20:34



#4118. Find the equation of a line whose slope is

and y-intercept is 5.

#12 Re: Ganesh's Puzzles » Mensuration » Yesterday 13:57:43


M # 325. The surface area of a cube is 150 square meters. Find the length of its diagonal.

#13 Re: Dark Discussions at Cafe Infinity » crème de la crème » Yesterday 01:02:08

342) Gertrude B. Elion

Gertrude B. Elion, in full Gertrude Belle Elion, (born Jan. 23, 1918, New York, N.Y., U.S.—died Feb. 21, 1999, Chapel Hill, N.C.), American pharmacologist who, along with George H. Hitchings and Sir James W. Black, received the Nobel Prize for Physiology or Medicine in 1988 for their development of drugs used to treat several major diseases.

Elion was the daughter of immigrants. She graduated from Hunter College in New York City with a degree in biochemistry in 1937. Unable to obtain a graduate research position because she was a woman, she found work as a lab assistant at the New York Hospital School of Nursing (1937), an assistant organic chemist at the Denver Chemical Manufacturing Company (1938–39), a chemistry and physics teacher in New York City high schools (1940–42), and a research chemist at Johnson & Johnson (1943–44). During this time she also took classes at New York University (M.S., 1941). Unable to devote herself to full-time studies, Elion never received a Ph.D.

In 1944 Elion joined the Burroughs Wellcome Laboratories (later part of Glaxo Wellcome; today known as GlaxoSmithKline). There she was first the assistant and then the colleague of Hitchings, with whom she worked for the next four decades. Elion and Hitchings developed an array of new drugs that were effective against leukemia, autoimmune disorders, urinary-tract infections, gout, malaria, and viral herpes. Their success was due primarily to their innovative research methods, which marked a radical departure from the trial-and-error approach taken by previous pharmacologists. Elion and Hitchings pointedly examined the difference between the biochemistry of normal human cells and those of cancer cells, bacteria, viruses, and other pathogens (disease-causing agents). They then used this information to formulate drugs that could kill or inhibit the reproduction of a particular pathogen, leaving the human host’s normal cells undamaged. The two researchers’ new emphasis on understanding basic biochemical and physiological processes enabled them to eliminate much guesswork and wasted effort typical previously in developing new therapeutic drugs.

Though Elion officially retired in 1983, she helped oversee the development of azidothymidine (AZT), the first drug used in the treatment of AIDS. In 1991 she was awarded a National Medal of Science and was inducted into the National Women’s Hall of Fame.


#14 Re: Ganesh's Puzzles » Oral puzzles » Yesterday 00:21:33



#4117. If the slope of the line joining the points (-4,a+2) and (1-2a,2) is

, find the value of 'a'.

#15 Re: Ganesh's Puzzles » 10 second questions » Yesterday 00:15:15



#6583. The diagonal of a cube is

centimeters. Find its volume in cubic centimeters.

#16 Re: Ganesh's Puzzles » Series and Progressions » 2018-06-19 23:56:36



SP#391. Find the sum of the given series:  1 + 3 + 5 + 7 + .... up to 100 terms.

#17 Re: Ganesh's Puzzles » Mensuration » 2018-06-19 23:29:39



M # 324. A rectangular tank is 225 meters by 162 meters at the base. With what speed must water flow into it through an aperture 60 centimeters by 45 centimeters that the level may be raised 20 centimeters is 5 hours? (In meters per hour).

#18 Re: This is Cool » Miscellany » 2018-06-19 23:12:33

141) Phenol

Phenol, any of a family of organic compounds characterized by a hydroxyl (−OH) group attached to a carbon atom that is part of an aromatic ring. Besides serving as the generic name for the entire family, the term phenol is also the specific name for its simplest member, monohydroxybenzene (C6H5OH), also known as benzenol, or carbolic acid.

Phenols are similar to alcohols but form stronger hydrogen bonds. Thus, they are more soluble in water than are alcohols and have higher boiling points. Phenols occur either as colourless liquids or white solids at room temperature and may be highly toxic and caustic.

Phenols are widely used in household products and as intermediates for industrial synthesis. For example, phenol itself is used (in low concentrations) as a disinfectant in household cleaners and in mouthwash. Phenol may have been the first surgical antiseptic. In 1865 the British surgeon Joseph Lister used phenol as an antiseptic to sterilize his operating field. With phenol used in this manner, the mortality rate from surgical amputations fell from 45 to 15 percent in Lister’s ward. Phenol is quite toxic, however, and concentrated solutions cause severe but painless burns of the skin and mucous membranes. Less-toxic phenols, such as n-hexylresorcinol, have supplanted phenol itself in cough drops and other antiseptic applications. Butylated hydroxytoluene (BHT) has a much lower toxicity and is a common antioxidant in foods.

In industry, phenol is used as a starting material to make plastics, explosives such as picric acid, and drugs such as aspirin. The common phenol hydroquinone is the component of photographic developer that reduces exposed silver bromide crystals to black metallic silver. Other substituted phenols are used in the dye industry to make intensely coloured azo dyes. Mixtures of phenols (especially the cresols) are used as components in wood preservatives such as creosote.


#19 Re: Ganesh's Puzzles » Doc, Doc! » 2018-06-19 15:28:30


#1269. What is 'Paraplegia'?

#20 Re: Ganesh's Puzzles » General Quiz » 2018-06-19 15:20:08


#6985. Name the Russian research station in inland Princess Elizabeth Land, Antarctica. Founded by the Soviet Union in 1957, the station lies at the southern Pole of Cold, with the lowest reliably measured natural temperature on Earth of −89.2 °C (−128.6 °F; 184.0 K).

#6986. In which country/continent is 'Iquique' situated? (One of the driest places in the World).

#21 Re: Ganesh's Puzzles » English language puzzles » 2018-06-19 14:54:04


#2973. What does the noun coup mean?

#2974. What does the noun coup de grâce mean?

#22 Re: Ganesh's Puzzles » Oral puzzles » 2018-06-19 14:41:49



#4116. Find the slope of the line joining the points (-3,8) and (4,-2).

#23 Re: Ganesh's Puzzles » 10 second questions » 2018-06-19 14:36:14



#6582. Find the angular elevation of the Sun when the shadow of a 15 meter long pole is


#24 Re: Ganesh's Puzzles » Series and Progressions » 2018-06-19 14:28:06


SP#390. Find the sum of the series : 2 + 6 + 18 + .... + 4374.

#25 Re: Ganesh's Puzzles » Mensuration » 2018-06-19 14:20:42


M # 323. The capacity of a tank is 246.4 liters. If the height is 4 meters, what is the diameter of the base?


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