If a roller coaster train has a potential energy of 1,500 J and kinetic energy of 500 J as it starts to travel downhill, its total energy is___J.

Once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 J, and its potential energy decreases to ___J.

When the train reaches the bottom of the track and is traveling along the ground, its kinetic energy is___J.

1)The mass of water increases.

2) Freezing point of water decreases.

4) bouyancy of objects in the water increases.

Salinity in the oceanic water is attributed by the water coming from other sources like rivers carrying rocks and soil containing salt. Salinity decreases the temperature of water, making it cold and more denser. The cold water settles at the bottom of the ocean. It flows across the oceanic basins as slow currents. The objects being less in density flows over the surface of water. Hence,bouyancy of objects in water increases.