Acork is floating in salty water. as more salt is added to the water to increase its density, the cork will

Float more above the water level

Explanation:

As we know that during flotation of the force balance equation is given as

weight of the cork is balanced by the buoyancy force due to liquid

so here we can say

V = volume of submerged part of the cork

now we have

now as we add more salt in the water then the density of water will increase due to which the submerged part of the volume will decrease as we know that it is inversely depends on density of the water

so here submerged volume will decrease so cork will float more part above the liquid level

asthenosphere and convection

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.