Compute the impact speed of a body released from rest at an altitude h = 426 mi. (a) assume a constant gravitational acceleration g0 = 32.2 ft/sec2 and (b) account for the variation of g with altitude. neglect the effects of atmospheric drag.

If you put a helium-filled balloon in the refrigerator, what will happen?

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.

Why do atoms emit energy of only specific wavelengths