The drawing shows two thin rods, one made from aluminum[= 23x10 -6 (degrees C) -

Question

The drawing shows two thin rods, one made from aluminum[= 23x10-6 (degrees C)-1] and the otherfrom steel [= 12x10-6 (degreesC)-1]. Each rod has the same length and the sameinitial temperature and is attached at one end to an immovablewall, as shown. The temperatures of the rods are increased,both by the same amount, until the gap between the rods isclosed. Where do the rods meet when the gap is closed? a) The rods meet exactly at the midpoint b) The rods meet to the right of the midpoint c) The rods meet tothe left of the midpoint The drawing shows two thin rods, one made from aluminum[?= 23x10^-6 (degrees C)^-1] and the otherfrom steel [?= 12x10^-6 (degreesC)^-1]. Each rod has the same length and the sameinitial temperature and is attached at one end to an immovablewall, as shown. The temperatures of the rods are increased,both by the same amount, until the gap between the rods isclosed. Where do the rods meet when the gap is closed? a) The rods meet exactly at the midpoint b) The rods meet to the right of the midpoint c) The rods meet tothe left of the midpoint

Explanation / Answer

note that the coeff of expansion is greater for aluminum (23 compared to 12 for steel) so aluminum expands more. . This means that they will meet to the right of themidpoint.

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