Answer:

Explanation:
From the question we are told that:
Number of lamps 
Potential difference 
Total Resistance of the lamp is 
Generally the equation for Current I is mathematically given by



Answer:

Explanation:
From the question we are told that:
Velocity of water 
Height=?
Generally, the equation for Water Velocity is mathematically given by

Therefore Height h is given as



Based on the information, both technician A and technician B are correct.
<h3>How to depict the information?</h3>
From the information given, Technician A says that mechanical shifting controls can wear out over time.
Technician B says that vacuum control rubber diaphragms can deteriorate over time.
In this case, both technicians are correct as the information depicted is true.
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