Answer:
a)  W = 46.8 J  and b)   v = 3.84 m/s
Explanation:
The energy work theorem states that the work done on the system is equal to the variation of the kinetic energy
     W = ΔK =  -K₀
 -K₀
a) work is the scalar product of force by distance
     W = F . d
 Bold indicates vectors. In this case the dog applies a force in the direction of the displacement, so the angle between the force and the displacement is zero, therefore, the scalar product is reduced to the ordinary product.
     W = F d cos θ
     W = 39.0 1.20 cos 0
     W = 46.8 J
b) zero initial kinetic language because the package is stopped
     W - =
 =  -K₀
 -K₀
     W - fr d= ½ m v² - 0
     W - μ N d = ½ m v
    on the horizontal surface using Newton's second law
      N-W = 0
      N = W = mg
  
      W - μ mg d = ½ m v
     v² = (W -μ mg d) 2/m  
     v = √(W -μ mg d) 2/m 
     v = √[(46.8 -  0.30 4.30 9.8 1.20) 2/4.3
]
     v = √(31.63 2/4.3)
     v = 3.84 m/s
 
        
             
        
        
        
research the different time zone around the world, and characteristics of each
 
        
             
        
        
        


Compounds contain two or more different elements. 
Water is a molecule because it contains molecular bonds . Water is also a compound  because it is made from more than one kind of element. (oxygen and hydrogen).
 So If you like, you can say that water is a molecular compound.
HOPE IT HELPED YOU.
 
        
                    
             
        
        
        
As the number of significant figures increases, the more accurate or precise the measurement is.
<h3>What is significant figure?</h3>
The term significant figures refers to the number of important single digits in the coefficient of an expression in scientific notation.
Significant figures are the digits in a value that are known with some degree of confidence.
The effect of reporting more or fewer figures or digits than are significant;
As the number of significant figures increases, the more accurate or precise the measurement is. 
As precision of a measurement increases, so does the number of significant figures.
Learn more about significant figures here: brainly.com/question/24491627
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