The answers to these questions are all connected by their relation to elements or materials that exist in gaseous state at standard temperature and pressure:
1. Helium exhibits superfluidity below 2.1K.
2. Neon gas was used to create neon lights.
3. Argon is an inert gas found in the atmosphere.
4. Krypton is an inert gas planet in Superman.
5. The Xbox 360 CPU code name was Xenon, relating to gases.
The common theme is gases or gas-related materials and properties.
Time travel is one of my favorite topics! I wrote some time travel stories in junior high school that used a machine of my own invention to travel backwards in time, and I have continued to study this fascinating concept as the years have gone by. We all travel in time. During the last year, I've moved forward one year and so have you. Another way to say that is that we travel in time at the rate of 1 hour per hour.
But the question is, can we travel in time faster or slower than "1 hour per hour"? Or can we actually travel backward in time, going back, say 2 hours per hour, or 10 or 100 years per hour?
It is mind-boggling to think about time travel. What if you went back in time and prevented your father and mother from meeting? You would prevent yourself from ever having been born! But then if you hadn't been born, you could not have gone back in time to prevent them from meeting.
Newton and his universal theory of universal gravitation. This Project explains what this theory is, how Newton proposed it and some other information about Isaac Newton.
This is about TIME TRAVEL...........
In this presentation I try to give best knowledge about the time travel if you want to learn about this plz view ..........
It is said that fact is sometimes stranger than fiction, and nowhere is this more true than in the case of black holes. Black holes are stranger than anything dreamt up by science fiction writers, but they are firmly matters of science ~fact.
Time travel is one of my favorite topics! I wrote some time travel stories in junior high school that used a machine of my own invention to travel backwards in time, and I have continued to study this fascinating concept as the years have gone by. We all travel in time. During the last year, I've moved forward one year and so have you. Another way to say that is that we travel in time at the rate of 1 hour per hour.
But the question is, can we travel in time faster or slower than "1 hour per hour"? Or can we actually travel backward in time, going back, say 2 hours per hour, or 10 or 100 years per hour?
It is mind-boggling to think about time travel. What if you went back in time and prevented your father and mother from meeting? You would prevent yourself from ever having been born! But then if you hadn't been born, you could not have gone back in time to prevent them from meeting.
Newton and his universal theory of universal gravitation. This Project explains what this theory is, how Newton proposed it and some other information about Isaac Newton.
This is about TIME TRAVEL...........
In this presentation I try to give best knowledge about the time travel if you want to learn about this plz view ..........
It is said that fact is sometimes stranger than fiction, and nowhere is this more true than in the case of black holes. Black holes are stranger than anything dreamt up by science fiction writers, but they are firmly matters of science ~fact.
CHEMATHON- The Science Quiz (Prelims), Resonance '21, St. Stephen's College.Jay Ingle
The Science Quiz, Prelims set of Chemathon, Resonance '21. The set is full of amazing questions. In total there are 20 questions, which are created by Chemistry Undergraduate students of The Chemistry Society, St. Stephen's College. The set will challenge any science student, and students will certainly enjoy the set.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
The increased availability of biomedical data, particularly in the public domain, offers the opportunity to better understand human health and to develop effective therapeutics for a wide range of unmet medical needs. However, data scientists remain stymied by the fact that data remain hard to find and to productively reuse because data and their metadata i) are wholly inaccessible, ii) are in non-standard or incompatible representations, iii) do not conform to community standards, and iv) have unclear or highly restricted terms and conditions that preclude legitimate reuse. These limitations require a rethink on data can be made machine and AI-ready - the key motivation behind the FAIR Guiding Principles. Concurrently, while recent efforts have explored the use of deep learning to fuse disparate data into predictive models for a wide range of biomedical applications, these models often fail even when the correct answer is already known, and fail to explain individual predictions in terms that data scientists can appreciate. These limitations suggest that new methods to produce practical artificial intelligence are still needed.
In this talk, I will discuss our work in (1) building an integrative knowledge infrastructure to prepare FAIR and "AI-ready" data and services along with (2) neurosymbolic AI methods to improve the quality of predictions and to generate plausible explanations. Attention is given to standards, platforms, and methods to wrangle knowledge into simple, but effective semantic and latent representations, and to make these available into standards-compliant and discoverable interfaces that can be used in model building, validation, and explanation. Our work, and those of others in the field, creates a baseline for building trustworthy and easy to deploy AI models in biomedicine.
Bio
Dr. Michel Dumontier is the Distinguished Professor of Data Science at Maastricht University, founder and executive director of the Institute of Data Science, and co-founder of the FAIR (Findable, Accessible, Interoperable and Reusable) data principles. His research explores socio-technological approaches for responsible discovery science, which includes collaborative multi-modal knowledge graphs, privacy-preserving distributed data mining, and AI methods for drug discovery and personalized medicine. His work is supported through the Dutch National Research Agenda, the Netherlands Organisation for Scientific Research, Horizon Europe, the European Open Science Cloud, the US National Institutes of Health, and a Marie-Curie Innovative Training Network. He is the editor-in-chief for the journal Data Science and is internationally recognized for his contributions in bioinformatics, biomedical informatics, and semantic technologies including ontologies and linked data.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Earliest Galaxies in the JADES Origins Field: Luminosity Function and Cosmic ...Sérgio Sacani
We characterize the earliest galaxy population in the JADES Origins Field (JOF), the deepest
imaging field observed with JWST. We make use of the ancillary Hubble optical images (5 filters
spanning 0.4−0.9µm) and novel JWST images with 14 filters spanning 0.8−5µm, including 7 mediumband filters, and reaching total exposure times of up to 46 hours per filter. We combine all our data
at > 2.3µm to construct an ultradeep image, reaching as deep as ≈ 31.4 AB mag in the stack and
30.3-31.0 AB mag (5σ, r = 0.1” circular aperture) in individual filters. We measure photometric
redshifts and use robust selection criteria to identify a sample of eight galaxy candidates at redshifts
z = 11.5 − 15. These objects show compact half-light radii of R1/2 ∼ 50 − 200pc, stellar masses of
M⋆ ∼ 107−108M⊙, and star-formation rates of SFR ∼ 0.1−1 M⊙ yr−1
. Our search finds no candidates
at 15 < z < 20, placing upper limits at these redshifts. We develop a forward modeling approach to
infer the properties of the evolving luminosity function without binning in redshift or luminosity that
marginalizes over the photometric redshift uncertainty of our candidate galaxies and incorporates the
impact of non-detections. We find a z = 12 luminosity function in good agreement with prior results,
and that the luminosity function normalization and UV luminosity density decline by a factor of ∼ 2.5
from z = 12 to z = 14. We discuss the possible implications of our results in the context of theoretical
models for evolution of the dark matter halo mass function.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
2. Clockwise
15 questions
Infinite bounce will be followed with
pounce
+10 if answered correctly, -10 if answered
incorrectly on pounce, no negative otherwise
3. It is thought that X might allow faster than light
travel. It is theorized that if two points are
connected by a X whose length is shorter than the
distance between them outside X, the time taken
to traverse it could be less than the time it would
take a light beam to make the journey if it took a
path through the space outside it. So, according
to theory of general relativity, if someone can
outrun time by travelling through a accelerating
X it can actually travel backwards in time.
What is X?
6. He is Swiss electrical
engineer George de Mestral. One
day in 1948 he went for a hiking
with his dog. When he was
returning he noticed that the plant
seed-sacs clang to dog’s fur. He
took some of those and inspected
under a microscope. He saw all the
small hooks that enabled the seed-bearing
burr to cling so viciously
to the tiny loops of the dog’s fur
and his pants fabric.
Inspired by this he invented X.With a weaver from a textile plant
in France he perfected the design and in 1955 he patented X.
Identify X.
9. In 1921, X travelled to Europe to attend the Congress of
Universities at Oxford. But his return voyage home lead
him to change history. The blue opalescence of the
Mediterranean sea made him wonder about the origin of
this beautiful phenomenon. The blue color of the sea was
thought to be because of the reflection of the blue sky.
Lord Rayleigh also proposed a theory on that. X, not
accepting that, took out his nicol prism and observed
diffraction patterns. He observed that maximum spectral
intensity was different for the blue sky and the blue sea. He
proposed that colour of the sea was due to light scattering
by the water molecules—called molecular diffraction. He
later performed various experiments on different liquids
and modified his theory. His discovered phenomenon was
later called as Y.
X or Y?
12. This is the modern version of a machine first invented
by William Mckercher, Chairman of Amguri Tea Estate,
Sibsagar in 1931. According to some account this method was
developed by him to produce greater quantities of black tea
using more mature, larger leaves which, when prepared with
milk and sugar could appeal to a broader market. Another
account says it was developed to increase the weight
of tea that can be packed into a bag or sack. The machine has
a series of cylindrical rollers with hundreds of small sharp
"teeth" that does the three required processing work.
Name the process or the product prepared.
16. contracted extended
picture shows the mechanism used by cats to extend its claws.
A modified version of this mechanism is used by X to extend
three thin bones that lie in the gaps of capels and metacarpels.
It probably has opposing sets of muscle/tendon complexes;
when one set relaxes & the other contracts and the bones slide
out.
Who uses this mechanism?
19. This is a high school research paper written by X which was presented in 1998 at
the Intel Science Talent Search, referred to as "the nation's oldest and most
prestigious" science competition. The paper went on to the semi finals of the
competition. The author, a Harvard University graduate, later contributed to the field of
psychology through her paper in "Frontal Lobe Activation during Object
Permanence: Data from Near-Infrared Spectroscopy”.
But she is not known as a scientist, but for her excellence in an entirely different field.
Id?
X
22. “Three ______ for Muster Mark!
Sure he has not got much of a bark
And sure any he has it's all beside the mark.”
- this is a passage from the James Joyce’s, Finnegans Wake.
The word blanked out in the passage was used by Murray
Gell-Mann to name his newly formulated elementary
particle. According to him he had in mind a pronunciation
for the word; but he could not find the right spelling. Then
he found that phrase containing the word X. Though it
differed a little bit in the pronunciation he kept it that way,
since “three _____” perfectly at that time (1960s) described
the nature of it.
Name this fundamental particle.
25. Compound 1 is a Glucoside of Indoxyl extracted from plant Isatis tinctoria which was
used in the reaction above to give a compound of blue colour.
But in 19th century a synthetic method was formulated known as Heumann synthesis
to get the final product. The reaction shown below has a huge impact on history
especially to India. It was one of the main factors to start which historical event?
28. X is a 7 m (23 ft) long Iron Pillar which is one of the
world's foremost metallurgical curiosities due to its high
resistance to corrosion. The pillar was manufactured by
the forge welding of pieces of wrought iron. Its resistance
to corrosion is due to a passive protective film at the iron-rust
interface. The presence of second-phase particles
(slag and unreduced iron oxides) in the microstructure of
the iron alter the polarization characteristics and promote
passivity. Another main reason for its corrosion resistance
is the presence of high amount of phosphorous.
Phosphorous content was more because ancient Indian
smiths did not add lime to their furnaces thus P is not
carried away as slag.
This pillar was erected by Kumaragupta I in
the temple of Muttra which was destroyed by Qutb-ud-din
Aybak to build the Qutub Minar. This pillar can still be
seen in the Qutb complex.
Name it.
32. X is one of the most well
known rapid-fire weapons and a
forerunner of the modern machine
gun. It was invented by the man in
the picture (also named after him)
in 1861. It was 1st used in American
civil war. The gun contained 6
barrels and the mechanism had to
be rotated by hand. It had gravity
feed reloading system and at that
time obtained an outstanding fire
rate of 200 rounds per minute.
It is still used in military with the
mechanism vastly improvised but
having a same kind of appearance.
X?
36. “There are normally four methods of performing the
required operation. Which are:
1. Stator resistance starting
2. Reduced voltage starting: there are another two
ways under this: Auto-transformer starter and Star-
Delta starter
3. Rotor resistance starter and
4. Direct or line starter ”
-this should have been the actual
answer to the question. But what he answered was
something bizarre and hilarious. About which
scene am I talking about or simply give me the
movie.
37.
38. Answer:
Movie 3 idiots
Scene: when Virus asks Raju how does
an induction motor starts he says “vrum
vrumm vruumm” (video removed)
39. Liquid crystal is a state of matter that possesses the
properties of both liquid and crystalline state. One
type of liquid crystal is thermotropic nematic liquid
crystal. The light passing through the nematic crystal
undergoes Bragg diffraction on these layers, and the
wavelength with the greatest
constructive interference is reflected back, which is
perceived as a spectral color. The spacing changes
with the temperature so it changes colour at different
temperatures.
This property of it was exploited by Josh Reynolds
and Maris Ambats to create which thing in 1975
that is said to indicate the emotional state of the
wearer?
42. He is David Saltzberg, a Professor of Physics and Astronomy at
the University of California. He earned a bachelors degree in physics in
1989 from Princeton University and a Ph.D. in physics from
the University of Chicago in 1994. From 1995-97 he worked at CERN in
Switzerland. Not very much well known, he has a contribution to the
entertainment world. He works as the technical director of X. His
work is the make X scientifically correct.
Identify the show, X.
46. According to the most accepted
theory Christiaan
Huygens developed the
original Magic Lantern in the
late 1650s. It used a concave
mirror in back of a light source
to direct as much of the light as
possible through a small
rectangular sheet of glass
onward into a lens at the front
of the apparatus which can be
adjusted to focus the light. At
the beginning sunlight was used
as the light source. Then with
the invention of argand light
limelight the image quality
improved. This is the
predecessor of which modern
day device?
49. According to a story there is an Indian temple in Kashi
Vishwanath which contains a large room with three
time-worn posts in it surrounded by 64 golden disks.
At the command of an ancient
prophecy Brahmin priests have been moving these
disks, in accordance with the immutable rules of the
Brahma, since that time. According to the legend, when
the last move of the puzzle will be completed, the
world will end. French mathematician Édouard
Lucas in 1883 first publicized it in the West. Working
out the math the minimum number of moves required
to solve this puzzle is 2n - 1, where n is the number of
disks.
Name this mathematical puzzle or game.
52. ……Connect the Dots……
(thematic connection round)
There are 6 question whose answers or the
part of the answers can be connected to a
common theme.
Answer all the questions and give the
connection.
Each question bears 10 marks and no
negatives.
For giving the connection you will be given
+10 extra.
53. 1.
Superfluidity is a state of matter in which the matter
behaves like a fluid with zero viscosity. In this state it
seems like that the fluid possesses the power to defy
gravity since it can raise through the surface of the
container in which it is kept and come out of it. This
characteristic behaviour was first seen in X in its liquid
form. X attains this state when it is cooled to 2.1K.
This property arises from the fraction of X atoms which
has condensed to the lowest possible energy. This
condensed fraction does not contribution to the entropy
or heat capacity of the liquid. It is a standard example
of Bose-Einstein condensation.
What is X?
54. 2.
He is Georges Claude, a French
inventor and businessman better
known as “the Edison of France”. His
most notable work is the invention
and commercialization of X. Inspired
by Geissler tubes he started
developing X with a view to the use
_______ which was produced as a by-product
of his air liquefaction
industry. He demonstrated his product,
two 12 meter long glowing tube, at
the Paris Motor Show in 1910.
His invention became a big commercial hit and his company
obtained complete monopoly to produce X in U.S.
Simply, X?
55. 3.
Its presence in the atmosphere was
suspected by Henry Cavendish in
1785. But it was isolated only in
1894 by Lord Rayleigh and
SirWilliam Ramsay using the
setup shown in picture. It was
named from a Greek word meaning
lazy. After it discovery it has found
many medical and industrial
applications; in welding and in
cryosurgery to name a few. It is also
used to fill incandescent lights with
nitrogen at a pressure of 400-600 Pa.
Name this element.
56. 4.
It was one-and-a-half times larger than the Earth and
orbited a red sun called Rao and was fifty light-years
from solar system. It had two satellites; Wegthor
and Mithen. Its civilization made much advancement in
science, robots and computers were used for many
tasks, conquered disease, learned to delay the aging
process, and perfected cloning. These advancements
also resulted in the destruction of it. There were
conflicts between its clones and science council which
resulted in a big war. It saw the development of some
super-weapons; the Eradicator and the Destroyer.
The Destroyer triggered an explosive chain reaction
within its core. It after several years decayed the core
and the core exploded to eventually destroy the planet.
Which planet?
57. 5
Y is the codename given to the
Microsoft XCPU, used in the Xbox 360. It was
developed jointly by Microsoft and IBM and the
program was announced on 2003-11-03. It
consisted of three independent processor cores on
a single die, 165 million transistors and 90
nanometre process. It was later replaced
by the XCGPU, which had the Y CPU and
the Xenos GPU integrated together.
Simple, id Y.
58. 6.
It you have got the connect, you
know the answer of this question.
60. 1.
Superfluidity is a state of matter in which the matter
behaves like a fluid with zero viscosity. In this state it
seems like the fluid possesses the power to defy gravity
since it can raise through the surface of the container in
which it is kept and come out of it. This characteristic
behaviour was first seen in X in its liquid form. X
attains this state when it is cooled to 2.1K. This
property arises from the fraction of X atoms which has
condensed to the lowest possible energy. This
condensed fraction does not contribution to the entropy
or heat capacity of the liquid. It is a standard example
of Bose-Einstein condensation.
What is X?
62. 2.
He is Georges Claude, a French
inventor and businessman better
known as “the Edison of France”. His
most notable work is the invention
and commercialization of X. Inspired
by Geissler tubes he started
developing X with a view to the use
_______ which was produced as a by-product
of his air liquefaction
industry. He demonstrated his product,
two 12 meter long glowing tube, at
the Paris Motor Show in 1910.
His invention became a big commercial hit and his company
obtained complete monopoly to produce X in U.S.
Simply, X?
64. 3.
Its presence in the atmosphere was
suspected by Henry Cavendish in
1785. But it was isolated only in
1894 by Lord Rayleigh and
SirWilliam Ramsay using the
setup shown in picture. It was
named from a Greek word meaning
lazy. After it discovery it has found
many medical and industrial
applications; in welding and in
cryosurgery to name a few. It is also
used to fill incandescent lights with
nitrogen at a pressure of 400-600 Pa.
Name this element.
66. 4.
It was one-and-a-half times larger than the Earth and
orbited a red sun called Rao and was fifty light-years
from solar system. It had two satellites; Wegthor
and Mithen. Its civilization made much advancement in
science, robots and computers were used for many
tasks, conquered disease, learned to delay the aging
process, and perfected cloning. These advancements
also resulted in the destruction of it. There were
conflicts between its clones and science council which
resulted in a big war. It saw the development of some
super-weapons; the Eradicator and the Destroyer.
The Destroyer triggered an explosive chain reaction
within its core. It after several years decayed the core
and the core exploded to eventually destroy the planet.
Which planet?
68. 5
Y is the codename given to the
Microsoft XCPU, used in the Xbox 360. it was
developed jointly by Microsoft and IBM and the
program was announced on 2003-11-03. It
consisted of three independent processor cores on
a single die, 165 million transistors and 90
nanometre process. It was later replaced
by the XCGPU, which had the Y CPU and
the Xenos GPU integrated together.
Simple, id Y.
72. Anti-clockwise
15 questions
Infinite bounce will be followed with
pounce
+10 if answered correctly, -10 if answered
incorrectly on pounce, no negative otherwise
73. It is the Daruma doll, a hollow,
round, Japanese traditional
doll modelled after Bodhidharma. It
is usually made of papier-mâché,
have a round shape, is hollow and
weighted at the bottom. The design
of the doll is such that at any
position of the doll the centre of
gravity does not leave the base of
the doll. This gives a special
characteristics to the doll and
because of this it is used
to symbolize the ability to have
success, overcome adversity, and
recover from misfortune. It has
another name, okiagari meaning to
raise up.
What is this special
characteristic of the doll?
74.
75. Answer:
It always comes to its upright position
irrespective of how it was placed or
tilted.
76. He was born in 1924 at Gauripur in Dhubri District,
pursued his graduation from Carmichael College,
Rangpur and obtained his post-graduation in Pure
Mathematics from Calcutta University in 1946,
with a first class and silver medal. After that he joined
Cotton college as a lecture which he left after a few
years. In 1957 he joined Assam Engineering College
as a lecturer in Mathematics and in 1982 retired as the
head of the Mathematics Department. He may not
have much in is name as a mathematician but he is a
renowned personality in a different field, a field where
he entered because of some provocative comments
and ridicules that he faced at his early years as a
lecturer at the Assam Engineering College for his
Bengali pronunciation.
Identify him. (picture on next slide)
80. X is a rare, naturally occurring meteoric ore, theorized
to be of extraterrestrial origin. It is found in two
different varieties: Antarctic and Wakandan;
Wakandan variety being the most common. This
isotope possesses the ability to absorb all vibrations in
the vicinity as well as kinetic energy directed at
it. The energy absorbed is stored within the bonds
between the molecules that make up the substance.
Antarctic isotope of X, on the other hand, emanates
vibrations which cause the atomic and molecular
bonds in nearby metals of other kinds to weaken. The
result is to cause nearby solid metals to liquefy.
Identify this metal.
83. 1) You must put behind you desire, anger, greed, folly,
pride, egotism, jealousy, harshness, calumny, falsehood, sloth
and improper conduct.
With short-cut nails, ritually clean and clad in the orange
garment, you must be pledged to truth, and full of reverence
in addressing me...
2) If, however, you behave perfectly, while I profess
false views, I shall be guilty of sin and my knowledge shall
bear me no fruit.
3) (after having finished your studies) with your
medicaments you shall assist Brahmins, venerable persons,
poor people, women, ascetics, pious people seeking your
assistance, widows and orphans and any one you meet on
your errands, as if they were your own relatives. This will be
right conduct.
What is this all about?
86. He is an Englishman Josiah Spode who
was the first to develop X. But Thomas
Frye also developed something that can
be considered precursor of X.
According to Josiah Spode’s method the
main ingredients of X are ash of cattle
bone which have low iron content and
Y (Kaoline). Y is used since it does not
contain any iron compounds which can
impart colour to the product enabling X
to be white in colour. Y is named so
because it was first found in Jiangxi
province of the country.
Name this common product whose name is derived from its
two prime ingredients.
89. There is dispute over the choice of spelling of
this quantity. In the past the Americans and
the English used to different spellings for it; X
and Y respectively. When the SI system was
introduced it recommended the use of Y with
the hope of securing worldwide uniformity in
the spelling of it. But the Americans disagreed
and they resisted so strongly that authorities
later sanctioned the American spelling X to it.
Spelling of which measured quantity is being
talked about?
92. This compound, Sildenafil citrate, was synthesized by
scientists Andrew Bell, David Brown, and Nicholas Terrett
working at Pfizer's Sandwich, Kent. It was synthesise as a medicine
for angina pectoris. But the first clinical trials suggested that the
drug had no effect on angina. It was found that it could induce
marked penile erections. So it was patented in 1996 as a medicine
to treat erectile dysfunction. After it came into market, it has been
used in different areas other than medical.
How do we know it better?
95. G. H. Hardy-“I remember once going to see him
when he was ill at Putney. I had ridden in taxi cab
number 1729 and remarked that the number seemed to
me rather a dull one, and that I hoped it was not an
unfavorable omen. "No," he replied, "it is a very
interesting number; it is the smallest number
expressible as the sum of two cubes in two different
ways.”
The number in the quote, 1729, can be expressed as
1729 = 13 + 123 = 93 + 103
The mention of the number can be found in one of X's
notebooks dated years before the incident.
How is this number known?
98. The cause of destruction of X is second mode of torsional
vibrations. This made the centre line of the structure to
remain motionless and the two halves of it twisted in
opposite directions. This vibration was caused by
aeroelastic fluttering. Fluttering is a physical phenomenon
when driving fluid and the structure behave as a composite
and it makes all the damping forces ineffective. Hence the
amplitude of vibration increase to ultimately break the
structure. This is different from resonance thought they look
similar. Both have different source of origin.
X is a common example found in secondary physics text
books to describe the effect of destructive resonance.
Studies show resonance is not the reason behind the
destruction of X, but the example stayed in the book since it
simplifies the situation for secondary level students.
X?
101. List shows some of the noted experimental scientists who have tried
to measure something and the value they have found. What was the
thing they tried to measure?
104. The bat shown in the picture was previously
identified as Myotis simus. But recently
scientists found out that it is an entirely
different species.
What is the funda behind its new name;
explain with reference to the other picture?
105.
106. Answer;
It was renamed as Myotis midastactus
which is named after King Midas because
of his golden touch. And the colour of the
bat is also golden
107. The picture(next slide) shows a small metallic cylinder
stored in three bell jars. This is placed inside a
specially-designed basement vault in Sevres, Paris.
This was cast by the firm Johnson Matthey in 1879
from platinum-iridium alloy. The alloy was chosen
because of its density and chemical stability. The
cylinder measures 39.17 mm in both diameter and
height, its edges have a four-angle (22.5°, 45°, 67.5°
and 79°) chamfer. It is taken out of this vault once in
every 40 years so that secondary standards all over
the world can be compared against it.
This is the primary standard of which measured
quantity?
111. Neutron star is the remnant of a dead star that result
from the gravitational collapse of a
massive star during a supernova event. Neutron stars
are the densest and tiniest stars known to exist in
the universe. It can have densities
of 3.7×1017 to 5.9×1017 kg/m3. It is so dense that one
teaspoon of its material would have a mass of
1100 tonnes. Its heart has an approximate
temperature of around 1011 to 1012 kelvin.
According to one account X was forged in the heart
of a neutron star by blacksmiths
Eitri, Brok and Buri. A bit of neutron star material is
also present in X among other constituents. This is
the reason that X is so heavy.
X?
114. The reaction shown is a
two step photolytic
reaction for synthesis of
X. in the first step 7-
dehydrocholesterol
is photolyzed by
ultraviolet light in a 6-
electron conrotatory ring-opening
electrocyclic
reaction; the product A
is precursor of X.
A X
In the second step A spontaneously isomerizes to X (cholecalciferol).
The first step of the reaction occurs in presence of light of
wavelength between 270 and 300 nm, present in sunlight. This
requirement of sunlight in the synthesis of X created a
misconception in most of the common people.
What is that misconnect?
115.
116. Answer:
That we get vitamin D from sunlight
X=vitamin D3
A= previtamin D3
117. last
The man in the picture is
William Marwood who in
1872 introduced this
concept. He scientifically
worked out how much drop
is necessary for a certain
weight to generate the
required force and twisting
moment. Other picture
shows a table used in
England and Singapore
which gives the value of
drop necessary for different
weights. William
Frederick Horry was the
first man on whom this
process was applied.
Which process?