Question

say the answer please help me out ​

Answer 1

Answer:

3) 3-56N or 56 J

5) the number of complete oscillations per unit time is called frequency. v=1/T

6)the sonar technique is used to determine the depth of the sea and to locate underwater hills, valleys , submarine , iceberg , sunken ships etc.8)valency

9)JJ Thomson

10) second part .- True

11)17

12)2-8-3

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