13. Boron has 2 main isotopes, Boron-9 and Boron-10. Which isotope is more abundant in nature and how can you tell?

1. in terms of fuel economy rank the following hybrid and electric vehicles, and justify application specific to each hybrid technology stop/start | mild hybrid | full hybrid | plug-in hybrid | full electric a. rank based on fuel economy b. justify your application specific for each technology

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.