When you earn $10/hour at work, you are getting paid based on a variable interval schedule of reinforcement

fixed interval schedule of reinforcement

fixed ratio schedule of reinforcement
variable ratio schedule of reinforcement

the tone of the passage is sympathetic to the forbidden love of romeo and juliet. the nurse plays a significant role in the play. she is responsible for making their meeting again possible. additionally, there is a sense of warning in the choice of words of the nurse. she seems to be authoritative when she calls romeo "scurvy knave", and at the same time the fact that she addresses to him as "sir" reflects respect. the nurse is "vexed", this word describes her confused state of mind. on the one hand, she finds romeo a fine and eloquent man, but on the other, it is thought that man's nature forces men to try to trick women.  

noun phrase/ noun phrase/ verb phrase/ noun clause/ awnsers are in order to questions above