Solve the problem.The energy loss E (in joules/kilogram) due to friction when water flows through a pipe is given by E = 0.020(L/D)v2. In the formula, L is the pipe length (in m), D is the pipe diameter (in m), and v is the water velocity (in m/s). Find a formula for the instantaneous rate of change of energy with respect to velocity.
A. dE/dv = 0.04(L/D)v
B. dE/dv = 0.02(L/D)v
C. dE/dv = (L/D)v
D. dE/dv = 0.04(L/D)v2
Answer: A
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÷ 1
A. 1
B. 2
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cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
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