When giving rescue breaths to a child, how should you breath into the child?

Which of the following are signs or symptoms of trouble breathing?

We discussed multiple greenhouse gasses and how they affect climate change different.  Substances such as CO2, Methane, Water, CFCs all have different global warming potentials and different persistence in the atmosphere. We know that CO2 has lower global warming potential than water does, however we focus on curbing CO2 emissions.  Explain why we focus our efforts on reducing CO2 emissions in order to fight climate change? 

Pre- means:

Which are associated with silicate tetrahedral units?

The molecules of a gas are much farther apart than molecules in a solid or liquid

A [m] g ball is lifted [h] cm above the ground.  How much work is done in joules?

A sonar signal is sent from an oceangoing ship, and the signal returns from the bottom [t] s later. How deep is the ocean beneath the ship if the speed of sound in seawater is [v] m/s?

A [m] kg mass has a kinetic energy of [ke] J.  What is its speed in m/s?

What is the mass of a [w] N object?