Leslie is speeding up to merge with traffic. When she begins to speed up, she has a velocity of 7.0 m/s west. When she merges with traffic 7.0 seconds later, she is traveling 23 m/s. Assuming east to be the positive direction, what is Leslie’s average rate of acceleration during this period? Select one:

a.2.3 m/s ^{2}

b.1.9 m/s ^{2}

c. -1.9 m/s ^{2}

d.-2.3 m/s ^{2}

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

Carbon 14 is a naturally occurring stable

Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above