What will be the equilibrium temperature when a 245g block of copper at 285 C is placed in 825g of water at 12 C?

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).

How does the strength of the electrostatic force between an electron and a proton compare to the strength of the gravitational force between them?

Ivana walks 2km north then turns around and walks 3km south