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PilotLPTM [1.2K]
2 years ago
13

What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?

Physics
1 answer:
ki77a [65]2 years ago
3 0

If that's the case, then  

                          50 units = 0.55 x the input energy

Divide each side by  0.55 :        

                   50 units/0.55  =  the input energy = 

                              <span> 90 and 10/11 units</span>
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A 40-cm-long tube has a 40-cm-long insert that can be pulled in and out. A vibrating tuning fork is held next to the tube. As th
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Answer:

The frequency of the tuning is 1.065 kHz

Explanation:

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\Delta L=74.7-58.6

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Hence, The frequency of the tuning is 1.065 kHz

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What will change the velocity of a periodic wave?
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