5. You observe that a chunk of tar sinks in puddles of rainwater but floats on the ocean.
An experiment to explain the behavior of the
tar should measure
A the difference between atmospheric
pressure and water pressure.
B the densities of fresh water, salt water,
and tar.
C the height from which the chunk of
tar is dropped.
D the depth of each type of water.

In which of the following would the particles move most rapidly? a. ice at -20 °c b. water at 20 °c c. steam at 110 °c d. boiling water e. ice at 0 °c

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

How many neutrons does plutonium -196 with an atomic number of 78.