A light source emits light with dominant wavelengths in the range of 650 to 690 nm. what is the principle color of light emitted by the source?

Which describes increasing the efficiency of energy resource

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?

Language is not the only way that humans communicate. describe how we use sound, touch, chemicals, and sight to communicate. need answer asap