Three point charges are located on the positive x-axis of a coordinate system. charge q1 = 1.5 nc is 2.0 cm from the origin, charge q2 = -3.5 nc is 4.0 cm from the origin and charge q3 = 4.5 nc located at the origin. what is the net force ((a)magnitude and (b) direction) on charge q1 = 1.5 nc exerted by the other two charges? ]

The atoms in a sidewalk on a hot summer day are vibrating the atoms in the sidewalk on a freezing day in winter. a. more rapidly than b. more slowly than c. at the same speed as

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

The graph describes the motion of an object. the object moves with from a to b. it from b to c. it moves with from c to d.