Physics
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The resistance of metals is often temperature dependent. the dependence is characterized
The resistance of metals is often temperature dependent. the dependence is characterized by the temperature coefficient of resistance (tcr), which is related to temperature according to r=rref[1+tcr*(t-tref)] over limited temperature range. rref is the resistance at some temperature tref. if the tcr of a platinum wire is 0.00393/°c and its resistance is known to be 20.1 ω at 25°c, what is the temperature of the wire if its resistance is 19.5 ω?
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marbo1
4,5(38 marks)
Try this suggested solution, if it is possible, check it in other sources.
genyjoannerubiera
4,8(75 marks)
Electromagnetic spectrum is a bunch of electromagnetic waves arranged according to their wavelength, from highest wavelength to the lowest wavelength
the highest wavelength will have the lowest energy value for eg micro wave
the lowest wavelength will have the highest energy value for eg cosmic waves
the order is
microwave,radiowave, infrared,red, orange, yellow,green,blue,indigo,violet, ultraviolet, Gamma rays and cosmic rays
the highest wavelength will have the lowest energy value for eg micro wave
the lowest wavelength will have the highest energy value for eg cosmic waves
the order is
microwave,radiowave, infrared,red, orange, yellow,green,blue,indigo,violet, ultraviolet, Gamma rays and cosmic rays
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