Assume that aluminum is evaporating from a source at the rate of 5 x 1020 atoms/sec. make an estimate of the time it would take to form a 2000a layer on a 4" wafer that is 150mm distant [and perfectly square to the source b: if the evaporating source used above is charged with 5 grams of aluminum- how long could it evaporate at that rate?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

What component of earth’s atmosphere exists entirely as a result of photosynthesis?