HOW A SUBMARINE DIVES INTO WATER AND RISES ABOVE THE WATER. SCIENTIFIC REASON.
How does a submarine dive?
Water is heavy, so the deeper you dive underwater, the bigger the weight squashing downing on you. This is what gives water its pressure, which is what makes an object float or sink. We can swim because the force of water pushing up from underneath us balances our weight pushing down. Although ships and submarines weigh much more, they float for the same reason. Submarines can either float or sink by pumping water in and out of the vast buoyancy tanks to change their weight. If their weight equals the force pushing upwards on them, they float - either on the surface or at any depth beneath.
Air fills the tanks. The submarine weighs relatively little, so the water pressure underneath is enough to support its weight.
2. Diving
Water fills the tanks, and the craft gains weight. The force pushing upwards is less than the weight of the vessel, so it sinks.
3. Rising
Air is pumped back into the tanks. The submarine loses weight, so the upward force due to water pressure pushes it to the surface.
0 Comments