It has been proposed that a spaceship might be propelled in the solar system by radiation pressure, using a large sail made of foil. how large must the surface area of the sail be if the radiation force is to be equal in magnitude to the sun's gravitational attraction? assume that the mass of the ship + sail is 1500kg, that the sail is perfectly reflecting, and that the sail is oriented perpendicular to the sun's rays. see appendix c in your book for needed data.

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.