calculate the valive of R in the circuit diagram shown above given that the effective resistance of the circuit is 4.0 and the internal resistance of the cell is negligible​

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

How is the gravitational force related to the distance between two objects?

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?