Allison is analyzing the fracture pattern of a window. She sees that the fracture lines encircle the point of impact. What type of fracture lines are these?

Concentric

Explanation:

I’m pretty sure but I’ll let you know for sure when I’m done with the test

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.