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Q. An object which absorbs all colours and reflects none appears:
A black object absorbs all wavelengths of light and reflects none and that's why it appears black. Consequently, black absorbs the most heat.
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Q. Generally radar is used for
Q. Which one of the following is a good electrical conductor?
Q. Specific gravity is defined as the ratio of
Q. The flux commonly used in brazing is
Q. The minimum number of geostationary satellites needed for uninterrupted global coverage is :
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