Which energy resource causes the most safety consents?

At what time will the interfering waves have an amplitudeof zero?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Consider a production line with five stations. station 1 can produce a unit in 9 minutes. station 2 can produce a unit in 10 minutes. station 3 has two identical machines, each of which can process a unit in 12 minutes (each unit only needs to be processed on one of the two machines. station 4 can produce a unit in 5 minutes. station 5 can produce a unit in 8 minutes. which station is the bottleneck station?