Does a plastic bottle of fresh water sink or float in the ocean? Why?
A) Sinks; The combined density of the plastic bottle plus the fresh water inside is greater than the density of the ocean water.
B) Floats; The bottle filled with fresh water floats in ocean water because it is less dense than the ocean water.
C) Floats then sinks; The bottle filled with fresh water floats in ocean water until the fresh water reaches the same temperature as the ocean water, at which point it sinks.
D) Sinks slightly; The added density of the plastic bottle will cause the bottle to sink slightly. It would most likely sink less than a foot where the density of the ocean water would be equal to or greater than the bottle of fresh water.
Question 2
The measured value 12.011 can be assumed to be accurate to +/- 0.001.
Indicate whether the statement is true or false
Question 3
After a uranium fuel rod reaches the end of its fuel cycle (typically 3 years) most of its energy comes from the fissioning of plutonium because ________.
A) fissionable Pu-239 is formed as the U-238 absorbs neutrons from the fissioning U-235
B) fissionable Pu-239 is formed as the U-235 absorbs neutrons from the fissioning U-238
C) fissionable Pu-239 is formed as the U-238 absorbs alpha particles from the fissioning U-235
D) fissionable Pu-239 is formed as the U-235 absorbs alpha particles from the fissioning U-238
Some amazing roles of water in biology
The water cycle.
Turn on water
The movement of water vapor molecules exerts vapor pressure on surfaces.
Carbon Monoxide and Water Molecules Interaction
Shallow-water systems are highly productive