In an experiment, a shearwater (a seabird) was taken from its nest, flown a distance 5220km away, and released. it found its way back to its nest a time 12.8days after release. a. if we place the origin in the nest and extend the +x-axis to the release point, what was the bird's average velocity for the return flight? v= . what was the bird's average velocity in m/s for the whole episode, from leaving the nest to returning? v=

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

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

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.