Rajiv is standing on the ground holding a helium-filled balloon on a string while Rashida is nearby, hanging upside down from a tree branch by her knees. If Rajiv releases the balloon, in which direction will Rashida's hair and the balloon move? Provide a very brief response.
Rashida's hair will hang toward the ground due to gravity, and the helium-filled balloon released by Rajiv will rise up into the air. Gravity pulls objects with mass towards the center of the Earth, which means Rashida's hair, being pulled by gravity, will point downward. On the other hand, the balloon filled with helium, a gas lighter than air, will experience a buoyant force greater than the force of gravity acting upon it, causing it to ascend into the atmosphere opposite to the direction of gravitational pull.