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Rabin Kalikote asked a question

Riemann's green is a green pigment ZnO.CoO, which is obtained by heating a mixture of zinc oxide and cobalt nitrate or by the reaction of cobalt nitrate with either  or zinc sulphate.

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Bhawana Yadav asked a question

2078-10-20
दाङ, नेपाल।

वरषीय सुशील भणडारीले आफनै गाउँमा सफलतापूरवक
सवचालित कार बनाएका छन ।दिएको जानकारी अनुसार
कारमा सुशीलले समाचार अधिकारीहरूलाई अनय कचचा
पदारथ जसता उपलबधयसको कषमता लगभग 15-20 किमी
/ घणटा छ। यो परियोजनाले उनलाई करिब रु.95,000
अवधि-चार महिना; भणडारी भनछन, ‘ किनन सकने गरी थप गरन
सकौं कम मूलयमा।”


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Rabin Kalikote asked a question

As we know that wave of sound is a mechanical wave and its speed is given by

v = (γRT/M)

whereas the wave of light is an electromagnetic wave and its speed is given by

c = (1/εoμo

So speed of sound depends on temperature of air but speed of light doesn't.

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