You have a chemical sealed in a glass container filled with air. the glass container has a mass of 200.0 grams and the chemical has a mass of 500 grams. the total mass of the set-up is 700 grams. the chemical is ignited by means of a magnifying glass focusing sunlight onto the reactant. after the chemical is completely burned, what is the total mass of the set-up?

Which sound characteristic is not affected by the relative motion of an object

Amerry-go-round of radius r, shown in the figure, is rotating at constant angular speed. the friction in its bearings is so small that it can be ignored. a sandbag of mass m is dropped onto the merry-go-round, at a position designated by r. the sandbag does not slip or roll upon contact with the merry-go-round. how would you rank the following different combinations of m and r on the basis of the angular speed of the merry-go-round after the sandbag "sticks" to the merry-go-round from largest to smallest. a) m = 10kg, r = 0.25r b) m = 20kg, r = 0.25r c) m = 10kg, r = 0.50r d) m = 10kg, r = 1.0r e) m = 15kg, r = 0.75r f) m = 40kg, r = 0.25r

Agust of wind pushes a beach ball with a force of 9 newtons.the ball rolls 10 meters in 3 seconds. what is the power of the wind?