A scientist gives three trees of the same size and species different amounts of water all summer. He measures how fast the trees grow. What is the
manipulated variable in this experiment?
O A. The size of the trees
B. The month the trees are measured
C. The growth rate of the trees
D. The amount of water

Which statement best describes how private industry decides where to spend the money on research and development

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.