1. A car travels at 55 m/s to the right for 2000 s, then the car turns around and travels towards the left at 33 m/s for 3000 s.

a. Determine the average speed of the car for the entire trip.

b. Determine the average velocity of the car for the entire trip.

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference

In which of the following is positive work done by a person on a suitcase

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