Most appropriate unit of measurement should be centimetres, cm.
Answer:
when we lower a bucket into a well to fetch water, the work done by gravity is positive since force and displacement are in the same direction.
Explanation:
Nothing happens. The frequency is determined at the source,
and it doesn't change along the way.
Answer:

Now,buyantant force

so;




Now,



And now,



Hence that,specific density of a given body is 3
please mark me as brainliest, please