California once proposed legislation that would have required 10 percent of its car fleet to be nearly emissions-free by the year 2003. This mandate spurred electric vehicle research. Such vehicles could be powered by photovoltaic cells or by batteries that are recharged using an electrical outlet. Would you agree that it is correct to conclude that electric vehicles that use electrical outlets are emissions-free

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?