an average raindrop has a volume of 0.03ml. How many raindrops fall on a football field that is 120 yards long and 80 yards wide in order to cover it in water 1 inch deep

When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false

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 average time that it takes for the car to travel the first 0.25m is s. the average time to travel just between 0.25 m and 0.50 m is s. given the time taken to travel the second 0.25 m section, the velocity would be m/s.