Question

An 85.0-N backpack is hung from the middle of an aluminum wire, as the drawing shows. The temperature of the wire then drops by 20.0 C¡ã. Find the tension in the wire at the lower temperature. Assume that the distance between the supports does not change.
physics question.
Please fill in the blank to complete the sentence:

Sin of a right angle means the Answer side over the hypotenuse.

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