A runner completes a full cycle on a circular track with a radius of 100 meters in 2 minutes. Find the total displacement of the runner after 4 minutes. ( circumference = 2πr where π=3, and 1 min=60s) 0 m

5 m

600 m
1.2 m

Is the portion of the electromagnetic spectrum that has a frequency just above that of visible light.

Which statement describes the formation of our sun? a disk formed of long trails of stars coiled into a spiral. it formed an elliptical flattened disk. heat and gases contracted within a nebula. gravity pushed stars away from a center core.

Diego is trying to lift a piano to the second floor of his house. diego uses a pulley system and gives a big lift to the piano. the piano moves upward, then stops, and then it starts to fall to the ground. which list best describes the forces on the piano in the proper order? positive force → balanced force → negative force negative force → balanced force → positive force positive force → unbalanced force → negative force negative force → unbalanced force → positive force