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23 Nov 2019

An aluminum rod has a resistance of 4.46 Ω at 20.0°C. Calculatethe resistance of the rod at 120°C by accounting for the changes inboth the resistivity and the dimensions of the rod. The coefficientof linear expansion for aluminum is 2.40e-5 (°C)^−1. answer inΩ

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Bunny Greenfelder
Bunny GreenfelderLv2
22 May 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

5. A certain lightbulb has a tungstenfilamentwith a resistance of 19.0 Ω whencold

(assume it is cold atroomtemperature of 20oC) and 140 Ωwhenhot. Assume that the

resistivity oftungstenvaries linearly with temperature even over the large

temperature rangeinvolvedhere, and find the temperature of the hot filament.

Assume the initialtemperatureis 20.0°C.

(a) an aluminum measuring rod, which is correct at 5.0 C measuresacertain distance as 88.42 cm at 35.0 C. Determine the errorinmeasuring the distance due to the expansion of the rod.
(b) if this aluminum rod measures a length of steel as 88.42cm at35.0 C, what is the correct length of the steel at 35degreesC. Thecoefficient of linear expansion of aluminum is 22 x10^-6C^-1.

answer to (a) .058cm
answer to (b) 88cm

can you help me to figure out how they got to these answers


A brass ring of diameter 10.00 cm at 19.8°C is heated and slippedover an aluminum rod of diameter 10.01 cm at 19.8°C. Assume theaverage coefficients of linear expansion are constant.


(a) To what temperature must the combination be cooled to separatethe two metals?
°C
(b) Is that temperature attainable?
Yes
No


(c) What if the aluminum rod were 10.10 cm in diameter?
°C
(d) Is that temperature attainable?
Yes
No

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