5. a 1-kg car and a 2-kg car are both released from the top of the same hill and roll down a frictionless track. at the bottom of the hill, which car will have the greater
speed? which car will have the greater kinetic energy?
o a the 1-kg car will have greater speed, and the 2-kg car will have greater kinetic energy
ob. the 2 kg car car will have greater speed, and the 7-kg car will have greater kinetic energy
oc. the cars will have equal speeds and equal kinetic energies.
od. the cars will have equal speeds and the 2 kg car will have greater kinetic energy

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

Supply is the markets term for selling a specific quantity of products at various prices. the law of supply and demand is the one which affect the pricing and also the quantity the market is able to produce or make available.

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion