An object is composed of
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What is the name of the tropical cyclones in the China Sea?
G-20 is the Group of Twenty largest economies represented by their
Which is the warmest layer of the atmosphere?
Carbon dioxide is produced by all of the following except
Which of the following refers to the number of pixels per inch, printed on a page?
In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called _________.
The SI unit of intensity of sound is ______.