In the 1990s, several studies revealed that corn ethanol had a net energy selector 1lossgainFor example, in dry mill ethanol plants, a total energy of 69,616 Btu (British thermal units, a common energy measurement) is used to produce 1 gallon of ethanol. If ethanol can provide 76,330 Btu per gallon, what is the net energy yield for one gallon of ethanol?73,330 Btu–6,714 Btu1.10 Btu6,714 BtuStill, despite its relatively low net energy yield compared with other fuel energy resources, corn ethanol has largely stayed competitive in the U. S. marketplace because of selector 1its low net energy yieldgenerous government subsidiesits efficient use of croplandHowever, its notable increase in net energy yields in recent years has provided proponents of corn ethanol with reason to keep it in the energy market. Which of the following could have contributed to this notable increase? Check all that apply. Energy consumed to make corn ethanol has been steadily increasing since the 1970s. Corn production per pound of fertilizer has increased steadily since the 1970s.

Did the proton move into a region of higher potential or lower potential? did the proton move into a region of higher potential or lower potential? because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of higher potential to a region of lower potential.because the proton is a negative charge and it accelerates as it travels, it must be moving from a region of lower potential to a region of higher potential.because the proton is a positive charge and it slows down as it travels, it must be moving from a region of higher potential to a region of lower potential.because the proton is a positive charge and it slows down as it travels, it must be moving from a region of lower potential to a region of higher potential.request answerpart bwhat was the potential difference that stopped the proton? express your answer with the appropriate units.î”v î” v = nothingnothingrequest answerpart cwhat was the initial kinetic energy of the proton, in electron volts? express your answer in electron volts.ki k i = nothing ev request answerprovide feedback

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.