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Question 2 (3 points)
When a low-mass star runs out of helium to fuse into carbon, what will it do?
start fusing carbon into other elements
die and form a planetary nebula
die and go supernova
grab material from a red giant and form a nova
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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.