The ac mains supply has a potential difference that continuously. polarity

what goes in the blank space ? the blank space is ment to be between continuously and p o l a r i t y

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

The ability to make things happen is also called a. heat b. force c. matter d. energy

Frequency of electromagnetic waves that a radio station is assigned. what do you call this type of wave?