Question

Write note on the following
1)ECG 2) ultrasonography 3)sonar​

Answer 1

Answer:

hey mate you can find this passage on 9 th standard science and technology book there is briefly given

Explanation:

I hope you should find by yourself..

I hope you will find.... or try to write yourself ..

Answer 2

Answer:

Write note on the following

1)ECG 2) ultrasonography 3)sonar