What is photometry?
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what is the principle used in electromagnetic spectrum?and why there is a necessary of having an electron with unpaired spins?and how the uncertainity principle is used to determine the frequency of an spectral lines ?
What is the term for the speed at which an object will overcome the gravitational attraction of the earth?
What is the melting point of copper?
What is the commercial unit of electric power
Explain what is a crest?
Does gas have density?
Explain how many more times louder is 70 decibels than 10 decibels?
Explain what is the longest lasting synthetic periodic element?
If a plane is in the air and there is a fly flying inside the plane does the plane get heavier when the fly lands?
Explain about Barometer?
WHICH OF THE FOLLOWING PAIR IS INCORRECT? A) ROENTGEN: X-RAY B) NEWTON: LAW OF GRAVITATION C) FARADAY: DIFFUSION OF GASES D) PASTEUR: BACTERIOLOGY
Which atomic model did erwin schrodinger create?