Work is (force) times (distance). For Amy, you know both of them, and you can easily multiply them to find the amount of work. For Joe, the distance is zero, which should tell you all you need to know.
        
             
        
        
        
Answer:
-2.26×10^-4 radians
Explanation:
The solution involves a right angle triangle 
Length is z while the horizontal is the height x
X^2+ 100^2=z^2
Taking the derivatives 
2x(dx/dt)=Z^2(dz/dt)
Specific moments = Z= 200 ,X= 100sqrt3 and dx/dt= 11
dz/dt= 1100sqrt3/200 = 9.53
Sin a= 100/a
Taking derivatives in terms of t
Cos a(da/dt)=100/z^2 dz/dt
a= 30° 
Cos (30°)da/dt= (-100/40000×9.5)
a= -2.26×10^-4radians
 
        
                    
             
        
        
        
Answer:
Stronger and harder than either of the pure metals
Explanation:
 
        
             
        
        
        
Answer:
The depth of the water at this point is 0.938 m.
Explanation:
Given that,
At one point
Wide= 16.0 m
Deep = 3.8 m
Water flow = 2.8 cm/s
At a second point downstream
Width of canal = 16.5 m
Water flow = 11.0 cm/s
We need to calculate the depth
Using Bernoulli theorem

Put the value into the formula



Hence,  The depth of the water at this point is 0.938 m.