Vivo z1pro auto disconnect charging after 100%or not

There is no option like an automatic disconnection after a full charge. But the system will send one popup window that charge is 100% means it is not ready to take any more charge.

My vivo z1pro unfortunately dropped water any problem occur in phone

Officially, for Vivo Z1 pro there is Ingress Protection (IP 67 or 68) rating. IP rating is there for any mobile means it is water-resistant and dust resistant. So, If your mobile (Vivo Z1 Pro) fell in water means there is no guarantee that it will work again properly. It may work if you are lucky enough. 

Experiment frequency response curve of single degree freedom system of vibration....

Single Degree of Freedom System:

               If we are able to determine the system orientation (any position) by a single coordinate then we call it a single degree of freedom system.

Importance of Frequency Response function:
              Frequency Response function (FRF) means how any particular system behaves in terms of magnitude and frequency with respect to any given exciting signal (Excitation signal may be sine, random, chirp, triangle, etc.., ).

             The frequency response function plot gives the modal parameters. For any system, it is necessary to determine the modal parameters. Modal parameters are Natural frequency, Damping ratio, and mode Shape.

For a single degree of freedom system, there will be a single Natural frequency that we can see in the FRF plot. It can be identified by the peak response in the plot. From the FRF, we have to determine the damping ratio using a 3 dB method or half-power bandwidth method.

not getting calls while playing games in vivo z1pro Mobile

Go to systems settings  --->  then, Open Ultra game Mode ---->   Click on Reject button...

there we can see.... toggle button (Switch on/off button)...

If you switch on it... It will reject all the calls while playing games... If you switch it off, You can get calls while playing games also...