11. Angie runs around a circular track for 20mins. The track is 1km and she runs at a rate of 1km10min. What is her total displacement?
a. 2km counterclockwise
b. 0.1km
c. 2km clockwise
d. Okm
e. 2km

Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Explain what will happen if decomposers were apsent from a forest ecoysystem.