What does this graph of plant heights show?

A. Plant 2 ended up taller than plant 1
B. Plant 1 was always taller than Plant 2
C. Plant 1 grew steadily. Plant 2 grew quickly at first and then stopped growing.
D. Plant 2 grew steadily. Plant 1 grew slowly at first and then grew quickly.

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

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.