When you release a balloon that is filled with air, the density of the balloon is higher than the air surrounding it. As a result, gravity pulls the balloon down towards the floor. The buoyant force acting on the balloon is not strong enough to overcome the force of gravity, causing the balloon to fall instead of float.
Islands do not float. Islands are the result of mounains or hills that go above thse surface of the water, which sit on the ocean floor.
Yes, the floor exerts an upward force on your feet in response to the gravitational force pulling you down. This force is known as the normal force and it helps to support your weight and keep you from falling through the floor.
It has nothing to due with "convection" or any other motion of the air. (If it did, then how would you explain floating helium balloons, which are at the same temperature as the air?) The pressure of the air around you (even perfectly still air) decreases with altitude. It's well known, for example, that the air pressure at the top of a mountain is much less than at the mountain's base--that's why you need breathing equipment up there. The difference is caused by the weight of the air itself--lower locations have a greater mass of air weighing down on them than higher locations, and that produces pressure. Even within a room, there's a SLIGHT difference in air pressure between the floor and the ceiling. The air pressure at the floor is slightly greater. That difference produces a small upward force called "buoyancy" on EVERY object in the room, including you. Air pressure pushes on you from all directions; but the pressure on your feet (pushing up) is slightly greater than the pressure on your head (pushing down). This isn't enough to make you float, but it is enough to reduce your measured weight by a small amount. The amount of buoyancy acting on an object depends on an object's VOLUME. For a typical adult human (in typical air), the buoyant force on their body is around 3 ounces. That means the number you see on the bathroom scale is about 3 ounces less than your "real" weight. It also means that if your "real" weight (due to gravity's pull) were less than 3 ounces, the buoyant force would overcome gravity, and you would float away! So the trick to floating is to reduce your weight (your mass), while increasing your volume (to increase the buoyant force). Both of those actions decrease your density. It turns out that if you decrease your density to the point that you're less dense than the air around you, the buoyant force will exceed the gravitational pull, and you'll float. So that's what hot air balloons do. Hot air is less dense (has fewer molecules per cubic meter) than cold air, so that reduces the balloon's weight. But because those molecules are moving fast, they have enough pressure to expand the balloon, increasing its volume (and hence increasing the buoyant force). When the buoyant force exceeds the weight, the balloon rises.
They all float (on the mantle), some just float lower than others. The main reason is what they're made of; all plates have a high percentage of silica in them, but those with more aluminium than magnesium (continental plates) float higher than those with more magnesium (ocean floor plates) because they're less dense.
If you need a one word answer, then I think "buoyancy" is what you're looking for. Buoyancy is caused by falling air pressure with altitude. Air pressure at sea level is over 14.7 pounds per square inch (2000 pounds per square foot!). You can feel this pressure by pulling on a suction cup. Because air pressure drops with altitude, the force from air on the top of an object is less than on the bottom. If the object has very low density (such as a helium-filled balloon), this difference in force is enough to push the object up.
A helium balloon rises to the ceiling because helium is lighter than air, allowing the balloon to float. Over time, helium slowly escapes through the balloon's material, causing it to lose buoyancy. Once the balloon's helium level decreases enough, it can no longer stay afloat and descends to the floor. Temperature changes and air pressure can also affect the balloon's behavior, contributing to its descent.
The balloon filled with air will float to the ceiling in a room filled with carbon dioxide. This is because the density of carbon dioxide is greater than the density of air. The balloon will experience a buoyant force upwards due to the density difference, causing it to rise towards the ceiling.
The balloon pops and the water falls out and splashes onto the floor.
Yes vents can be in the floor instead of the wall.
If you simply release an object, the initial velocity is always zero.
It does act upon it. If gravity weren't acting upon the ball, it would float into the air instead of remaining on the alley floor.
The balloon pops and the water falls out and splashes onto the floor.
Some Neons have a trunk release lever on the floor by the door.
because it doesn't have any oxygen in it.
The cat may choose to sleep on the floor instead of the bed because it finds the floor more comfortable, cooler, or simply prefers that spot for sleeping.
Diaphragm, Pelvic Floor, Internal Obliques and Transversus Abdominus
engineered floors such as pergo or Armstrong should float on a supplied pad because the will expand and contract with weather conditions