Answer:

Explanation:
The equation for work is:

We can substitute the given values into the equation:

 
        
                    
             
        
        
        
The answer would be 6 because 2.0x3= 6
(newton’s 2nd law)
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Answer:
21 m/s.  
Explanation:
The computation of the wind velocity is shown below:
But before that, we need to find out the angles between the vectors 
53° - 35° = 18°
Now we have to sqaure it i.e given below 
v^2 = 55^2 + 40^2 - 2 · 55 · 40 · cos 18°
v^2 = 3025 + 1600 - 2 · 55 · 40 · 0.951
v^2 = 440.6
v = √440.6
v = 20.99 
≈ 21 m/s
Hence, The wind velocity is 21 m/s.  
 
        
             
        
        
        
Answer:
4 m/s
Explanation:
Momentum is defined as:

where
m is the mass of the object
v is its velocity
For the object in this problem, we know:
p = 200 kg m/s is the momentum
m = 50 kg is the mass
Solving for the velocity, we find:

 
        
             
        
        
        
Answer: first one is electrochemical 
Second one is combustion 
Third one is photosynthesis 
Fourth one is respiration