Antimatter atoms have been trapped for the first time ?!
Researchers at Cern, home of the Large Hadron Collider, have held 38 antihydrogen atoms in place, each for a fraction of a second. Antihydrogen has been produced before but it was instantly destroyed...
View ArticleA numerical problem from Beats
Nithya asks: “A source of sound frequency 256Hz is moving rapidly towards a wall with a velocity of 5m/s. How many beats per second will be heard if sound travels at a speed of 330m/s?” a wire of...
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why in all the system of units time is always in second?
Please tell me why in all the system of units time is always in second? -Pankaj Sharma Incoming search terms: system unit No related posts.
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Frequency of sound and loudness
What is meant by frequency? Does the loudness of sound increase with frequency? ( Thiruveni Nainar asked this question) Answer: As you know, sound is produced by the vibrations of the sounding body....
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The SI & CGS unit of time is same .Why?
Almost in all systems of unit second is the unit of time, most probably because, second is the most convenient one, if we look at the guidelines for selecting a unit. For more details refer to the...
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A body is dropped from a tower of height 96 m. Another body is thrown up from...
A body is dropped from a tower of height 96 m. Another body is thrown up from the ground after a second with a velocity of 40 m/s. When and where they will meet? SOUNDARYA asked Answer: For the first...
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Download sample question papers from CBSE
Sample Question Paper for Class IX & X for Term II (Second Term – March 2012) Sample Question Paper, Syllabus and Guidelines for Class IX & X for Term I (First Term – Setember 2011) Sample...
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