Suppose several particles are in concentric circular orbits under the influence of some centripetal component of force, the magnitude of which depends on distance from the center of the motion. each particle has a different orbital radius r and a corresponding period t. how does the force depend on r if t is proportional to sqrt(r) ?
how does the force depend on r if t is proportional to r^3/2 ?
how does the force depend on r if t is independent of r ?

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees. 

a electromagnetic waves

i believe the answer would be:

d. violin, clarinet, french horn, and tuba

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table