The total oxygen atoms that are exprected in the vinegar and baking soda reaction is three oxygen atoms.
Answer: B. 3
why;live
 
        
                    
             
        
        
        
True. The mass of an electron is about 1/2000 amu whereas the mass of a proton is 1 amu.
        
                    
             
        
        
        
At angular speed of 3 rev/s, the object moves a distance equal to 3 times the circumference of the circle each second, or a distance of 3 • 2<em>π</em> (1.20 cm) ≈ 22.6 cm.
So, with a linear speed of 22.6 cm/s = 0.226 m/s, the object has a centripetal acceleration <em>a</em> of
<em>a</em> = (0.226 m/s)² / (0.012 m) ≈ 18.8 m/s²
directed toward the center of the circle.
 
        
             
        
        
        
Let  denote the angle made by a given force with the positive <em>x</em>-axis (pointing right). So in (1), <em>A</em> makes an angle of 90º - 30º = 60º, and <em>B</em> makes an angle of -45º; and in (2), <em>A</em> still makes angle of 30º, <em>B</em> makes an angle of -15º, and <em>C</em> makes one of -90º.
 denote the angle made by a given force with the positive <em>x</em>-axis (pointing right). So in (1), <em>A</em> makes an angle of 90º - 30º = 60º, and <em>B</em> makes an angle of -45º; and in (2), <em>A</em> still makes angle of 30º, <em>B</em> makes an angle of -15º, and <em>C</em> makes one of -90º.
Separate each force vector in to <em>x</em>- and <em>y</em>-components, then compute the required vector. This involves writing each given vector  as
 as

where

(1)



(2)




