Jordan wants to see if earthworms prefer rough or smooth terrain to crawl through. What will be his independent variable? This is what he will change in his experiment.
change the type of worm
how much food they have
change the terrain
O where each worm starts from

If forces acting on an object are unbalanced, which factors may result fron an unbalanced force? check all that apply

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?