US 11. A baseball in motion is acted upon by four directional forces as shown.
4+
2
What must be true of the forces for the baseball to continue to move in the same direction with the same
speed?
A Force 1 is greater than force 3.
ning
ty
B. Force 2 is greater than force 4.
C. Forces 1, 2, 3, and 4 are balanced.
D. Forces 1, 2, 3, and 4 are unbalanced.

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.