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Jeong-Ho Lee

Member since June 19 2011

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89 questions

596 answers

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16

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What force holds the planets in their circular orbit?

To make an object move in a circular path there are two factors. The object needs to move at a constant speed and to be pulled toward the centre... (read more)

  answered 13 years ago

When will be the next appearance of Halley's comet?

Halley's comet was named after the English astronomer Edmund Halley. He was influenced by his friend Issac Newton and predicted the return of this comet using... (read more)

  answered 13 years ago

Who proved the Fermat's last theorem?

Fermat's last theorem It is impossible to find whole numbers for a, b, c such that an + bn = cn where n is a whole number greater than 2. Fermat's last theorem had not been proven for 358 years since... (read more)

  answered 13 years ago

What's the difference between a Harpsichord and a Clavichord?

Clavichord was invented during the early 14th century (Baroque period). It was a very early form of the piano and is small rectangular wooden box. It produces a very stringy sound and has no dynamic control due to lack of pedals. (read more)

  answered 13 years ago

Who invented the equal sign?

The first equal sign appeared in the Robert Recorde's book, The Whetstone of Witte in 1557. He wrote "And to avoid the tedious repetition of these words : is equal to... (read more)

  answered 13 years ago

What's the most efficient way to get rid of the fish smell in the house after cooking? Opening windows is not an option as its too cold in the winter.

Since any form of open flame can burn odor in the air, candles are good for eliminating odor like fish smell. They also create an attractive mood in the house. Open... (read more)

  answered 13 years ago

Who proved that there are infinitely many prime numbers and how?

Around 300 B.C. Euclid of Alexandria proved that there are infinitely man prime numbers. He proved it by contradiction which is one of well-known proof methods. Suppose that prime numbers are finite and the largest prime number is p. The complete list... (read more)

  answered 13 years ago

What is the 1089 trick?

1. Think of any 3 digit number as long as the first digit is 2 or more greater than the last one. 2. Reverse it. 3. Substract the smaller number from the bigger. 4. Reverse it. 5. Add numbers of the step 3 and 4. You will alwasy get 1089. Let's play... (read more)

  answered 13 years ago

Does green tea contain caffeine?

Green tea does contain caffeine. The content of caffein depends on various factors such as length of brewing time. Green tea prepared from unfermented... (read more)

  answered 13 years ago

Are tea and coffee good for preventing diabetes?

Studies have shown that tea may help prevent the development of type 1 diabetes and slow the progression once it has developed and also shown that... (read more)

  answered 13 years ago

What is the RESTful API?

The term REST (representational state transfer was first introduced by Roy Fielding, who is one of principal authors of the HTTP 1.0 and 1.1, in his doctoral thesis in 2000. RESTful API is a simple web service implemented using HTTP and the principles... (read more)

  answered 13 years ago

If I save 250 pounds each month at the annual interests rate of 4%, how much interests will I get after a year?

You can calculate each month interests and then add up all to find the solution. 1st month interests: 250 x 0.04 x (12 / 12) = 10 2nd month interests: 250 x 0.04 x (11 / 12) ... 12th month interests: 250 x 0.04 x (1 /12) Sum of all above is the interests... (read more)

  answered 13 years ago

Who are the supporting organizations and opposing organizations of the PIPA bill?

The specific supporting organizations of the PIPA (PROTECT IP Act) bill are: CBS CorporationComcastCouncil of State GovernmentsDisneyEstee Lauder CompaniesFord Motor CompanyJohnson & JohnsonMajor... (read more)

  answered 13 years ago

What does RTE mean?

RTE stands for Rich Text Editor in the browser. Also it is know as the WYSIWYG (What You See Is What You Get) editor. The RTE can provide editing functionalities such as bold, italic, underline, indent,... (read more)

  answered 13 years ago

What are the OAuth processes?

The following diagram explains the oauth processes: A. Consumer requests a request token. B. Service Provider grants requst token.... (read more)

  answered 14 years ago