Answer the following questions:
1. What is the Principle of Floatation ?
2. Why ships float on seawater while a nail of iron sinks?
3. An iceberg floats in seawater. Explain, why?
4. Why are the densities of solids, liquids and gases different?
5. How does density decide whether an object will float or sink?
Answer:
An iron nail sinks in water but a ship made of iron floats? The floating of a big ship is based on the Archimedes’ principle. An iron nail sinks because it has more weight than the weight of the water it displaces. In other words, the density of the iron nail is greater than the density of water.
Explanation:
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Answer:
1. When any boat displaces a weight of water equal to its own weight, it floats. This is often called the “principle of flotation”: A floating object displaces a weight of fluid equal to its own weight. … Archimedes’ principle, as stated above, equates the buoyant force to the weight of the fluid displaced.
2. While the shape of an iron ship is made in such a way that it displaces more weight of water than its own weight. Secondly, the ship is hollow and the empty space contains air which makes the average density of the ship less than that of water and hence it floats on water.
3. Because of the dissolved sediments and minerals, sea water is slightly denser than pure water. Its density is approximately 1.03 g/mL. That means that ice (like icebergs) also floats in sea water. In fact, fresh water from melting icebergs will form a layer on top of the denser sea water.
4. In general, solids are denser than liquids, which are denser than gases. . The particles in the solid are touching with very little space between them. The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.
5. Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.