What is the rate constant of a first-order reaction that takes 550 seconds for the reactant concentration to drop to half of its initial value? express your answer with the appropriate units.

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).

Which inventor was often called the lady edison