When a ship enters from sea to river it:
Rises up
Sinks totally
Stops moving
Sinks a little
A loaded cargo ship sails from sea water to river water ? State and explain your observation.
Explain the following : (a) Icebergs floating in sea are dangerous for ships. (b) An egg sinks in fresh water, but floats in a strong salt solution. (c) A toy balloon filled with hydrogen rises to the ceiling, but if filled with carbon dioxide sinks to the floor. (d) As a ship in harbour is being unloaded, it slowly rises higher in water. (e) A balloon filled with hydrogen rises to a certain height and then stops rising further. (f) A ship submerges more as it sails from sea water to river water.
Give scientific reasons;
(1) The ships entering fresh water from sea water sink to a greater extent.
(2) The cutting edges of tools like knives, blades etc are provided with sharp edges.