Stove Fuel Portable lanterns and stoves used for camping andbackpacking often us

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Stove Fuel Portable lanterns and stoves used for camping andbackpacking often use 9) oxygen molecules are 16 times more massive than hydrogen molecules. Ata given temperature, how do their average molecular speeds compare? The oxygen molecules are moving molecules. A) four times faster than the hydrogen B) at 1/4 the speed of the hydrogen molecules. D) at 1/16 the speed of the hydrogen molecules. E) at 1N2 the speed of the hydrogen molecules. hollow sphere of negligible mass and radius Ris completely filled with a liquid so that its density is p. now the sphere so its radius is 2R and completely fill it with the same liquid. What is the density of the enlarged sphere? A) 8 p B) 4 C)p/2. D) P E) pl8 11) An air bubble underwater has the same pressure as that of the surrounding water. As the air bubble rises toward the surface (and its temperature remains constant, the volume of the air bubble A) increases. B) decreases. C) remains constant. D) increases or decreases, depending on the rate it rises. Compared water is denser than fresh water. A ship floats in both fresh water and salt water. A) more. to the fresh water, the volume of water displaced in the salt water is B) less. C) the same. cannot be determined because we do not know the volume of the ship. D) 13) A 10-kg piece of aluminum sits at the bottom lake, right next to a 10-kg piece of of a lead, which is much denser than Which one has the greater buoyant force on it? the aluminum B) the lead C) Both have the same buoyant force. D) It cannot be determined without knowing their volumes.

Explanation / Answer

9) V = Sqrt ( 3RT/m)

   speed of oxygen = 1/4 times the speed of the hydrogen atom

10) density = mass / volume

   density remains same.

11) size of the bubble increases because surrounding pressure decreases when air bubble rises

12) Less volume of salt water displace due to high density of salt water

13) It cannot be determined without knowing their volumes

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