Why is silicon the most used semiconductor? Silicon, a very common element, is used as the raw material of semiconductors because of its stable structure. Purification of Silicon consumes large amounts of power. In Japan, refined Silicon (ingot) with purity of at least 98% is imported from Australia, China and Brazil, where electricity is relatively […]
What are nematocysts and its functions?
What are nematocysts and its functions? Nematocysts are organelles that have stinging cells. They are present in Cnidarians. Nematocyst paralyses the preys by injecting poison and helps Cnidarians to catch their prey. What are nematocysts class 11? Hint: A nematocyst or a cnidocyte is a type of an explosive cell which contains an enormous organelle […]
How did Ellis Island benefit society?
How did Ellis Island benefit society? Almost 12 million immigrants were processed through the immigration station on Ellis Island between 1892 and 1954 when the station closed. This legislation dramatically reduced the number of immigrants allowed to enter the United States. The Emergency Quota Act, passed in 1921, ended U.S’s open door immigration policy. What […]
What did Katharine Drexel do for the church?
What did Katharine Drexel do for the church? Katharine Drexel of Philadelphia is known for many things: heiress to a banking fortune, fierce advocate for the poor, foundress of the American religious order Sisters of the Blessed Sacrament, and canonized saint in the Catholic Church. How did St Katharine Drexel serve God? In 1891, Saint […]
Which Monarchs completed the Reconquista?
Which Monarchs completed the Reconquista? Once Spain was reconquered, Muslims and Jews were forced to convert to Christianity or be expelled from Spain. King Ferdinand II of Aragon, and Queen Isabella of Castile. Finally, the Reconquista was driven by a desire for land and profit. Why was Martin Luther primarily dissatisfied with the Roman Catholic […]
How old is the oldest mirror?
How old is the oldest mirror? The oldest known mirrors date to around 6,000 BC from the site of Çatal Hüyük in modern-day Turkey. Around 3,000 years later the Egyptians made metal mirrors from highly polished copper and bronze, as well as precious metals. Who and when was the mirror invented? The silvered-glass mirrors found […]
What is a utility bill in Australia?
What is a utility bill in Australia? Utility bill – a Telephone, Water, Electricity or Gas bill. Travel concession card issued by State transport authorities. Rates notice – a notice of rates issued by an Australian municipal council. An Australian bank issued plastic debit or credit card. An Australian bank statement. What does utility account […]
What did Sutton study and what did he want to understand?
What did Sutton study and what did he want to understand? Sutton developed this hypothesis in “The Chromosomes in Heredity” (1903) and concluded that chromosomes contain hereditary units and that their behaviour during meiosis is random. His work formed the basis for the chromosomal theory of heredity. What did Sutton want to understand? In the […]
What type of bells are described in the poem bells?
What type of bells are described in the poem bells? Most of the poem is a more hurried trochaic tetrameter. The bells of which he writes are thought to be those he heard from Fordham University’s bell tower, since Poe resided in the same neighborhood as that university. He also frequently strolled about Fordham’s campus […]
What is the normal size of prostate at the age of 47?
What is the normal size of prostate at the age of 47? Results: The analysis is based on 1,763 participants. In these men aged 50-80 years, mean total prostate volume continuously increased from 24 to 38 cc and mean PSA concentration from 1.1 to 2.5 ng/ml. What is the normal size of prostate at the […]