What level of increase in compression ratio would be required to offset the lower energy of ethanol and deliver the same work as the gasoline engine assuming that 25% more ethanol fuel mass is used compared to gasoline.

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!

How is the way a mixture is combined different from how a compound is combined?