The Stanford Linear Accelerator Contains Hundreds of Brass Disks Tightly $\degree$

question 74

Multiple Choice

The Stanford linear accelerator contains hundreds of brass disks tightly fitted into a steel tube (see figure) . The coefficient of linear expansion of the brass is 2.00 *10^-5 per C $\degree$ . The system was assembled by cooling the disks in dry ice (-57 $\degree$ C) to enable them to just slide into the close-fitting tube. If the diameter of a disk is 80.00 mm at 43 $\degree$ C, what is its diameter in the dry ice?

• A) 78.400 mm
• B) 79.998 mm
• C) 80.160 mm
• D) 79.840 mm
• E) none of these

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