I have recently put windows XP onto an old laptop and now notice that it has no audio device to play music.
Is there anyway to get this back and is the solution specific to the make of laptop?
Thanks for the help
Q5. The light in a car park is suplied via a cable 85m long. The area of the cable is 4mm². Calculate the resistance of the cable if the resistivity is 1.67x 10 to the power of -8 ohms.
R = p x L/A
p x 85000/4 = 0.000354875
Q4 A coil is made up of 12000 turns of copper wire. the lenght per turn is 120mm, and the area is 0.275mm². Calculate the resistanceof the coil if the resistivity is 1.67 x 10 to the power of -8.
1.67x10^-8 x 12000x120mm / 0.275 = 0.08744...
but i did get a U at phsics a level so im...
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