How does gis allow us to re-examine what we know about the world?

Some studies have found that what percentage of students have cheated in some form? a. 10% b. 25% c. 45% d. 75%

Which of these is a disadvantage of hydrogen fuel cells? a. engines that use hydrogen fuel are more efficient than gasoline-powered engines. b. the only emission produced by hydrogen fuel cells is water. c. hydrogen fuel is continually available and useful for heating. d. hydrogen fuel is often purified in a process that emits lots of greenhouse gases.

Technician a says most shops use a spray wash cabinet to degrease their engine blocks. technician b says some shops dip their major engine parts in a hot or cold caustic solution for deeper cleaning. who is correct?