) ions). Average density at the surface is 1.025 kg/l. Seawater is denser than both fresh water and pure water (density 1.0 kg/l at 4 Â°C (39 Â°F)) because the dissolved salts increase the mass by a larger proportion than the volume. The freezing point of seawater decreases as salt concentration increases. At typical salinity, it freezes at about â2 Â°C (28 Â°F).
How does air resistance affect the acceleration of a falling object? As a falling object accelerates through air, its speed increases and air resistance increases. While gravity pulls the object down, we find that air resistance is trying t â¦ o limit the object's speed. Air resistance reduces the acceleration of a falling object. It would accelerate faster if it was falling in a vacuum.
Air Resistance is a force. It is a force which act in the  opposite direction that you are travelling (except in space, where  air resistance is non-existent). It is caused â¦ by molecules of  air colliding with an object, causing it to slow down and  eventually stop. Air Resistance can also be known as drag.    Maybe the images in the related links section will help you get an  understanding of Air resistance.    As you can see from the picture, the car's thrust is greater than  its drag, so it goes faster.