) 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.
C. The acceleration of freely falling objects is proportional to their mass. D. If a net force does act on an object, the object will accelerate in the direction of the net force. 23. Three blocks have masses 1.0 kg, 7.0 kg and 5.0 kg as shown.f the samenet force F acts on an object of mass 2m, its acceleration will beA. 1.0 m s 2 B. 2.0 m s 2 C. 4.0 m s 2 D. 8.0 m s 2 - 9 -27. A 5.0 kg concrete block accelerates down a 34Â° slope at 4.2 m s 2.