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
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