Explanation:
I'm not sure to be honest lol
Answer:



Given:
Weight of solid in air, 
Weight of solid in water, 
Weight of solid in liquid, 
Solution:
Calculation of:
1. Relative density of solid, 


2. Relative density of liquid, 


3. Density of liquid in S.I units:
Also, we know:

where
= density of liquid
= density of water
Now, from the above formula:


Answer:
The answer is A
Explanation: hope this helps :)
Answer:
the object is called Newton's cradle balance ball you can search it on Google