Gravity on the surface of the bottom of Mariana trench ? Assume there is water. During the descent , in the TRIESTE Could they measure difference in gravity and compare it with the surface water ?
There is water, no assuming required. The difference in gravity would be very little. I don't know enough about the instrumentation to answer the question any further. The pressure would be tremendously different but the gravity difference would be very little.
Hi Tim glad to see you back. You may like this. https://en.m.wikipedia.org/wiki/Gravity_of_Earth Alex
https://physics.stackexchange.com/questions/132935/gravity-beneath-sea-level It depends largely on what Earth density model you use. Forget actually sending a person down there. We have robotic gravitometer instruments that can easily stand up to the pressure at the bottom of an ocean. Better build more than one for this measurement, though. Evidently, there are still megalodons down there.
