What is the mass of a cannonball if a force of 2,500 n gives the cannonball and acceleration of 200 m/s2?

In order to find the mass of the cannon ball, you'll have to divide the force by the acceleration according to Newton's second law. Meaning it m=F/a , m = 2500N ÷ 200 m/s.

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. 

i believe the answer would be:

d. violin, clarinet, french horn, and tuba