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PHYS 1010 Lecture Notes - Thermal Expansion, Multimeter

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amaranthcattle81
16 Oct 2011
School
York University
Department
Physics and Astronomy
Course
PHYS 1010
Professor
Marko Horbatsch

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Document Summary

Lab 5 thermal physics: thermal expansion, copper (for example) [please get the reading in multi-meter and use calibration factor to convert it into. Also use the formula to find the error, As during this process, only height is: for aluminum/steel [do similarly, charles" law. We know the volume of a cylinder is, changing, therefore, we can conclude that. Therefore we can write the relation of charles" law for this experiment as follows: If the dependence between the height h of the cylinder and the temperature t is linear, Table 1: the dependence of the height of the cylinder h versus the temperature of the air t. T (oc) h (mm) then the charles" law is verified. where is a proportionality constant. Figure 1: charles" law height (h ) versus temperature (t): heat engine. Figure 2: pressure-volume diagram for the heat engine gauge pressure versus volume.

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Related Questions

An engineer needs a resistor with a zero overall temperature coefficient of resistance of 20.0oC. She designs a pair of circular cylinders, one of carbon and one of Nichrome as shown in the figure. The device must have an overall resistance of R1 + R2 = 10.0 Ω independent of the temperature and a uniform radius of r = 1.50 mm. Ignore the thermal expansion of the cylinders and assume both are always at the same temperature. (a) Can she meet the design goal with this method? (b) If so, state what you can determine about the lengths L1 and L2 of each segment. If not, explain.

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Coefficient of thermal expansion for:
Steel: 12 x 10-6
Copper: 12 x 10-6
Aluminum: 24 x 10-6

Review. When a straight wire is warmed, its resistance is given by  according to Equation 27.20, where a is the temperature coefficient of resistivity. This expression needs to be modified if we include the change in dimensions of the wire due to thermal expansion. For a copper wire of radius 0.100 0 mm and length 2.000 m, find its resistance at 100.0°C, including the effects of both thermal expansion and temperature variation of resistivity. Assume the coefficients are known to four significant figures.