Answer:
The force is 
Explanation:
From the question we are told that
The mechanical advantage is
The load is
The height is 
Generally mechanical advantage is mathematically represented as

Here E is the force that must be applied to move the piano
=> 
=> 
=> 
I know what you are wondering and the answer is simply crystals are more dense than water , so they sink but if you warm it up they can combine with it to become one.
dose this help?
No, because the word might offend that person.
C.) A girl hangs by both hands, motionless, from a trapeze.
I think D. None of the above
I think that it