Because upward buoyant force is slightly higher than gravitation force for this particular object
Answer:
The moon has no atmosphere
Explanation:
The temperatures on the surface of the Moon vary much more than those on Earth because the moon has no atmosphere (third answer in the list), and therefore there are no molecules that could retain residual heat and make the change from day to night a softer transition.
Answer:
Explanation:
Given
Power Supplied
[/tex]
Efficiency of the motor 
and 



So, vacuum cleaner delivers a power of 