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Why were the scientists not able to observe most of the cell organelles before 1940?
Before 1940, scientists were limited in their ability to observe most cell organelles due to the lack of advanced microscopy techniques. Light microscopes, which were primarily used at the time, could not resolve structures smaller than about 200 nanometers, making it difficult to see many organelles. The development of electron microscopy in the 1940s allowed researchers to visualize cellular components at much higher resolutions, revealing the complex structures of organelles that were previously unseen.
When was astatine found?
In 1940, astatine was produced in a lab at the University of California by the three scientists named Carson, Mackenzie, and Segre. This element is classified as a semi-metal and has the atomic number of 85.
Position of actinides in the periodic table?
1. PRIOR TO DISCOVERY OF TRANS-URANIUM Element is before 1940): Naturally occuring heaviest elements are Th, Pa, & U. 2. FOLLOWING THE DISCOVERY OF THE TRANS-URANIUM ELEMENT : These are Np came in 1940, Pu in 1941, Am, Cm, Bk, CF, Es , Fm, Md, No & Lw
Length of a school day in 1940 in America?
In 1940, the typical school day in America was around 9:00 AM to 3:00 PM, lasting about six hours. However, the exact length of the school day could vary between schools and regions.
Who discovered that neutrons exist in the nucleus of an atom?
The fission of uranium with neutrons was discovered at 17.12.1938 by Otto Hahn and Fritz Strassmann.The spontaneous natural fission of uranium was discovered by Flerov and Pietrzak in 1940.
Why were the scientists not able to able to observe most of the cell organelles before 1940?
Before 1940, scientists did not have access to advanced microscopy techniques that could penetrate deep into cells to observe organelles. The technology at that time had limited resolution and magnification, making it difficult to visualize small structures within cells. Additionally, many organelles are transparent or similar in density to the surrounding cytoplasm, making them challenging to distinguish without specialized staining methods.
What are the discovery dates for plutonium?
Plutonium was discovered in 1940 by Glenn Seaborg and alii.
What are the release dates for Ma He's Making Eyes at Me - 1940?
Ma He's Making Eyes at Me - 1940 was released on: USA: 15 March 1940 Portugal: 4 March 1942
Why is the Peking man the archaeological discovery so important?
Peking Man was an archaeological discovery found in China that is 500,000 years old. The bones were being moved in the 1940's and were somehow lost in the move.
Was WWE around in the 1940's?
no it wasnt
Was McDonald's around in 1910?
No, it was introduced in the 1940.
When did the Holocaust began in Europe?
Around 1940.
What percentage of Americans smoked in the 1940's?
I have calculated around 56.76% of Americans smoking in 1940.
What was the population of New Mexico in 1940?
The population of New Mexico in 1940 was around 531,818 people.
Why were the scientists not able to observe most of the cell organelles before 1940?
Before 1940, scientists were limited in their ability to observe most cell organelles due to the lack of advanced microscopy techniques. Light microscopes, which were primarily used at the time, could not resolve structures smaller than about 200 nanometers, making it difficult to see many organelles. The development of electron microscopy in the 1940s allowed researchers to visualize cellular components at much higher resolutions, revealing the complex structures of organelles that were previously unseen.
What were various forms of energy used to heat homes around 1900-1940?
what were various forms of energy used to heat homes around 1900-1940.
What is the life expectancy of a male born in 1940?
The life expectancy for a male born in 1940 was around 60 years.
