Answer the following questions after evaluating the video, 1. What does a backpack designer do?
A backpack designer is a designer that makes backpacks and
2. How does a backpack design differ between various audiences?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

A( developed during the process of technology design