D. Pickup truck because it's heavy and it gained more momentum
when a chemical bonds with another chemical it creates an element that element can be a gas, liquid, solid, or a metal. depending on which chemicals bond you will get different elements
Answer:
Radius, r = 2.88 meters.
Explanation:
It is given that,
A hydrogen-filled balloon is used to lift a 120-kg stone off the ground, m₁ = 120 kg
The basket holding the stone has a mass of 10.0 kg, m₂ = 10 kg
Mass density of air, 
We know that buoyant force is equal to the weight of liquid displaced i.e.



B = 1274 N
Also, buoyant force is given by :





So, the minimum radius R of the balloon be in order to lift the stone off the ground is 2.88 meters. Hence, this is the required solution.