Suggest which element in Table 1 might be the most expensive. Give a reason why you cannot be certain about your prediction. Please look at the screenshots!

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.