An arrow pointing upward is placed to the left of a thin converging lens, as shown in the diagram. to identify the location of the image, a student draws three principal from the arrow. what feature should all three principal rays have in common?

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

If the specific heat of a metal is 0.850 j/g °c, what is its atomic weight?

What energy transformations occur each time the skateboarder rolls up the ramp?