) 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.
Free Fall: Objectives: 1. Describe the motion of an object in free fall. 2. Describe the motion of an object thrown up and allowed to fall until it hits the ground. 3. Determine the speed and distance of an object at any time during free fall assuming that air resistance is negligible. 4. Explain why the acceleration of an object in free fall does not depend on the mass of the object.