the amount of work done on a machine is 300 J and the machince does 50 J of work what can you say about the amount of friction that the machine has while operating

Foreshadowing. the prologue states that this is the story of "star-crossed lovers." there are four strong foreshadowings of evil in act 1. identify at least two foreshadowings and explain their purpose.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?