1. A student using a stopwatch finds that the time for
10 complete orbits of a ball on the end of a string
is 25 seconds. The period of the orbiting ball is
A 25 sec
B 2.0 sec
C. 2.5 sec
D. 5.0 sec

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

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