Answer:
It does not hit the students face because the speed of the balloon slows down as energy is lost through thermal.
Explanation:
It's either 3 or 4 I know this becuase I have read a book about electricity
Answer:
Height will be 3.8971 m
Explanation:
We have given that radius of the solid r = 1.60 m
Mass of the solid disk m = 2.30 kg
Angular velocity 
Moment of inertia is given by 
Transnational Kinetic energy is given by
as we know that v = 
So 
Rotational kinetic energy is given by 
Potential energy is given by mgh
According to energy conservation

