This woman is riding a bicycle down a hill at a constant speed and in a straight line.
Which situation will change the direction of the bicycle?
A. Added forces of 10 N up the hill and 30 N down the hill
B. An added force of 20 N down the hill
C. Added forces of 30 N up the hill and 30 N down the hill
D. An added force of 20 N to the side of the hill

c

Explanation:

43.452

step-by-step explanation:

284 times .153 = 43.452

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-