Does a plastic bottle of fresh water sink or float in the ocean? ...

[meagbuch]

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

[nguyenhoanhat]

Answer to Question 1

B

Answer to Question 2

TRUE

Answer to Question 3

A

[meagbuch]

Excellent

[mohan]

TYSM