A. the carbons are unbalanced
B. the hydrogens are unbalanced.
D. the chlorines are unbalanced.
That leaves C. to be correctly balanced.
        
                    
             
        
        
        
The total work done is  5980 Joules and the power expended is  57 Watts.
<h3>What is work done?</h3>
The work done is the work done in the gravitational field as the bucket is raised up Thus work required to remove the bucket Wb;
Wb = 13.9 kg * 25.9 m * 9.8 m/s^2 = 3530 Joules
 Height of the center of mass of chain = 25.9 / 2 = 12.95 m  
Work done by the chain Wc;
Wc = 12.95 * 19.3 * 9.8 = 2450 Joules  
Total work = 3530 + 2450 = 5980 Joules
Power expended = W / t = 5980 J / 105 sec = 57 J/s = 57 Watts
Learn more about work done:brainly.com/question/13662169
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Answer:
Por ela ter batido na trave, não tem como voltar 2x mais forte, por que toda ação correspondente a uma reação de igual intensidade, mas que atua no sentido oposto 
Explanation:
 
        
             
        
        
        
The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. The number of neutrons is equal to the difference between the mass number of the atom (M) and the atomic number. Therefore, it is true!
 
        
                    
             
        
        
        
When  t=2, the ball has fallen     d(2) = 16 (2²) = 64 feet .
When  t=5, the ball has fallen     d(5) = 16 (5²) = 400 feet .
Distance fallen from  t=2  until  t=5  is  (400 - 64) = 336 feet.
Time period between  t=2  until  t=5  is  (5 - 2) = 3 seconds.
Average speed of the ball from  t=2  until  t=5  is
                 (distance covered) / (time to cover the distance)
             =            336 feet        /        3 seconds       =  112 feet per second.
That's what choice-C says.