B. Inertia and gravity must be balanced.
Answer:
Repel
Unlike
Atrract
Fur
Balloon
Positivley charged
negative
postive
neutral
Explanation:
It goes from top to bottom
Explanation:
Since the balloon is not accelerating means that the net force on the balloon is zero. This implies that the weight of balloon must be equal to the buoyant force on balloon.
Hence, the buoyant force equals the weight of air displaced by the balloon, also 20,000 N.
Weight of the air displaced = density of air × volume
The density of air at 1 atm pressure and 20º C is 1.2 kg/m³
the volume V = 20,000/(1.2×9.8) = 1700 m³