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posted by anviange
What are the most important scientific
discoveries of all time? The answer might
include Copernicus's idea that the sun is
at the center of the solar system,
Newton's laws of motion, Mendeleev's
periodic টেবিল of elements, Einstein's
theory of relativity and Darwin's theory of
evolution. There are numerous great
scientific discoveries that have
significantly influenced the way we think
and live throughout history. 100 Greatest
Discoveries recounts the 100 most
important scientific discoveries of all time
and explains them with historical re-
creations, archival footage and interviews
with scientists.
100 Greatest Discoveries - Chemistry
This episode recounts thirteen important
discoveries in chemistry, including Joseph
Priestly's discovery of oxygen, John
Dalton's atomic theory, and Dmitry
Mendeleev's discovery of periodic টেবিল of
elements. Here are the thirteen important
discoveries:
1. Oxygen (1770s)
2. Atomic Theory (1808)
3. Atoms Combine Into Molecules (1811
onward)
4. Synthesis of Urea (1828)
5. Chemical Structure (1850s)
6. Periodic টেবিল of the Elements (1860s -
1870s)
7. Electricity Transforms Chemicals (1807
- 1810)
8. The Electron (1897)
9. Electrons for Chemical Bonds (1913
onward)
10. Atoms Have Signatures of Light
(1850s)
11. Radioactivity (1890s - 1900s)
12. Plastics (1869 and 1900s)
13. Fullerenes (1985)
four ways to make আগুন without matches অথবা lighters using chemistry.
video
reaction between sodium hydroxide and aluminium with a hydrogen balloon to finish the vid
video
One of the latest inventions in the field of
light emitting devices might change the way
people light their homes and নকশা clothes.
The device represents a thin film of plastic
able to conduct electricity and create solar
power.
Scientists working on the international project
are looking অগ্রবর্তী to bring the organic light
emitting devices to the masses. Thus the
invention could significantly cut costs by
billions of dollars each year.
Due to the fact that the organic light
emitting devices are very thin and flexible,
electronic display screens could be easily
created on nearly every material, thus, for...
continue reading...
আপনি can use liquid nitrogen to make ice cream pretty
much instantly. This makes a nice cryogenics অথবা phase
change demonstration. It's also just plain fun. This
recipe is for স্ট্রবেরি ice cream. If আপনি omit the
strawberries, আপনি can add a bit of vanilla for vanilla ice
cream অথবা some চকোলেট syrup for চকোলেট ice cream.
Feel free to experiment!
Difficulty: Average
Time Required: Minutes
Here's How:
Tips:
What আপনি Need:
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Chemistry
1. This recipe makes a half gallon of স্ট্রবেরি ice
cream....
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added by anviange
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