Explain what is photometry?
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Explain what is the heterogenous?
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Explain the Positive Acceleration ?
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What happens, when a magnet is floated on a big cork in a through of water ?
What is the direction of null vector?
Why does the colour of a material look differently in sunlight that than in the electrical-lamp
Explain how many femtometers are in a nanometer?
How can you conform that magnetic lines come from a single bar magnet with out any external instruments?