I need 3 4 5 answers

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Which feature of a heating curve indicates a change ofn state

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.