How many femtometers are in a nanometer?
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Explain what is a crest?
What are the characteristics of black body? : quantum physics
Explain nuclear fusion?
What is the Cement ?
What is the name for the physical constant with a value of 6.62 x 10-27 erg seconds?
Why dies the earth move round the sun, and the moon round the earth ?
Why does heat cause matter to expand?
What is the difference between emf & current
What is the difference between photodiode & photocell.
What is frequency of sound in air?
Explain the Machines ?
why velocities of x rays and gamma rays are same inspite they have different wavelengths and frequencies