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Natali [406]
3 years ago
15

What must modelo and theories do in order to remain valid ?

Physics
1 answer:
yulyashka [42]3 years ago
6 0
1) There must not be credible contrary evidence to the ideas suggested by the theory.
2) The models and theories must obey the already established laws of physics. Laws are theories which have such an overwhelming amount of evidence that they are universa, and cannot be disproven.
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Read 2 more answers
The Mistuned Piano Strings Two identical piano strings of length 0.800 m are each tuned exactly to 480 Hz. The tension in one of
IRINA_888 [86]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The answer is

     T_2 = 1.008 % higher than T_1

    T_2 = 0.99 % lower than T_1

Explanation:

   From the question we are told that

         The first string has a frequency of   f_1 = 230 Hz

          The period of the beat is  t_{beat}  = 0.99s

Generally the frequency of the beat is

             f_{beat} = \frac{1}{t_{beat}}

  Substituting values

            f_{beat} = \frac{1}{0.99}

                   = 1.01 Hz

From the question

        f_2 - f_1 = f_{beat}   for  f_2  having a  higher tension

So

       f_2 - 230 = 1.01

               f_2 = 231.01Hz

 From the question

            \frac{f_2}{f_1} = \sqrt{\frac{T_2}{T_1} }

         \frac{T_2}{T_1}  = \frac{f_2^2}{f_1^2}

Substituting values

         \frac{T_2}{T_1}  = \frac{(231.01)^2}{(230)^2}

      T_2 = 1.008 % higher than T_1

    For f_2 having a lower tension

           f_1 - f_2 = f_{beat}

  So

       230 - f_2 = 1.01

            f_2 = 230 -1.01

                  = 228.99

  From the question

            \frac{f_2}{f_1} = \sqrt{\frac{T_2}{T_1} }

         \frac{T_2}{T_1}  = \frac{f_2^2}{f_1^2}

    Substituting values

         \frac{T_2}{T_1}  = \frac{(228.99)^2}{(230)^2}

      T_2 = 0.99 % lower than T_1        

5 0
4 years ago
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