A car converts the chemical energy of gasoline to the mechanical energy of motion. The total energy of motion is less than the total energy stored in the gasoline. Evidence that energy is still conserved, however, is found in which of the following observations? A. The mass of the moving object, the car, is greater than that of the gasoline.
B. The energy in the gasoline was extracted from crude oil, which had more energy.
C. Some of the energy of the gasoline is also converted to heat and sound energy.
D. Not all car engines are equally efficient at this energy transformation.

Like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.

True is the answer. hthhth