Concept explainers
a. The speed of water just before hitting the turbine blades.
b. The rate of transfer of mechanical energy to turbine blades.
Answer to Problem 85GP
Solution:
a. The speed of water is approximately
b. The rate of transfer of mechanical energy is
Explanation of Solution
Given:
The water flow rate is
The vertical height of fall is
Formula used: Energy conservation of water will lead us to
m is the mass of water, v is its speed and his the height.
For part b, the formula of power must be used,
Where, W is the work done and t is the time.
Calculations:
a
From the energy conservation equation,
b
The rate of transfer of mechanical energy is called power. So, calculate the power.
Since, efficiency is 55%:
Conclusion:
a. The speed of water is approximately
b. The rate of transfer of mechanical energy is
Chapter 6 Solutions
Physics: Principles with Applications
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