Hi. I would like to purchase some physics equipments, such as magnets, mirrors, circuits, ammeters/voltmeter, etc., for my own physics project. I don't know where to look. Do you guys know of a website that sells any physics products? Or can only a licensed professional purchase them?
Can you show how you got this by eliminating all the other variables? Even from this simplified form, there isn't an initial resistance to begin with. Unless...
R_o = R / 1.03
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Homework Statement
A platinum wire is originally at 15 degree Celcius. Find the required temperature to increase its resistance by 3%.
Homework Equations
R = Ro * [1 + 'a' * (T-To)]
Ro is initial resistance. To is initial temperature.
'Temperature Coefficient' 'a' of platinum at room...
You would draw it NorthEast, or 3 o'clock angle, or 30 degrees, or Up-Right, etc. From there, you can find the total displacement from starting point (assuming you can see the triangle).
Homework Statement
Find the resistance of a 1.4 m length of copper wire with diameter of 5*10^-3 m.Homework Equations
R = p(L/A) where p = resistivity of copper, L = length, A = areaThe Attempt at a Solution
The resistivity of copper is (1.69 * 10^-8). Radius is d/2 (5*10^-3) / (2) =...