Density is the measure of mass per unit volume. It is an important factor in determining whether an object will float or sink in water. Objects with a higher density than water will sink, while objects with a lower density will float.
Wood has a lower density than water, which is why it is able to float. The pores in wood contain air, which makes it less dense than water. This air also provides buoyancy, allowing the wood to float on the surface of the water.
Yes, a person can float in water due to their density. The average density of the human body is slightly lower than that of water, which is why most people are able to float. However, this can vary depending on factors such as body composition and lung capacity.
When a person takes a deep breath and submerges in water, their density decreases. This is because the air in their lungs increases their overall volume, making them less dense than the water around them. This allows them to float more easily.
The density of an object in water is related to both its weight and volume. The weight of an object affects its density, as a heavier object will have a higher density. The volume of an object also plays a role, as a larger object will displace more water and have a lower density. This is why two objects of the same weight can have different densities in water.