A boy walks from point C to point D which is 50 m apart. Then, he walks back to point C. what is his displacement of his whole journey ? A.25 m
B.75 m
C.50 m
D.0 m

What are igneous intrusions and extrusions

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

What is the role of the water cycle in maintaining freshwater levels in lake and rivers?