Aglider with mass m = 0.250kg sits on a frictionless horizontal air track, connected to a spring with force constant k = 4.60 n/m . you pull on the glider, stretching the spring 0.100 m , and then release it with no initial velocity. the glider begins to move back toward its equilibrium position (x=0).a) what is the speed of the glider when it returns to ? b) what must the initial displacement of the glider be if its maximum speed in the subsequent motion is to be 2.60 ?

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.