Anything that displaces less than 302 ml of water, (in addition to the displacement of the empty boat),
before the surface comes trickling over the gunwales.
the rock pumice has air pockets making it less dense than water, while a rock that has a similar size has no air pockets making it more dense than water and therefore sinking.
An object in water displaces its weight in water. If its volume is greater than the volume of water displaced this way, it floats. Ships, despite being made of heavier materials, utilize their size and their relative empty insides to float this way.
One thing to consider in trying to find out the length of time the lifevest will float is the size of the vest and the weight pulling down on it. Also the quality of vest.
That depends on the size of the rock.
100 grams is 3.5 ounces. About 1/4 of an average package of frozen fish.
The total weight of the surface area of a boat is less than than the weight of a body of water of the same size (buoyancy), so that is why it floats. A needle sinks because a body of water with the same size is lighter than the needle. Note: It is entirely possible to float a needle on water. It requires a bit of doing, but it can be done.
The size of the boat is equal to the water displaced by the boat. This means, if the boat is bigger then its weight, the boat will float. If the boat is smaller than its weight, it sinks. This is why metal ships are so big.
What detimines whether an oject will sink or float is the amount of fluid that it displaces. If the amount of fluid displaced weighs more than the object then it will float, if it weghs less it will sink. A boat can be made of any material, even concrete.
This depends on the density: if the density is greater than 1 g/cm3 (density of water) an object sink; if the density is lower the object float.I tested just now four tooth brushes: three sink, one float !
greater density items wood tend to sink, they are heavier then items of less density with same displacement size
No!!!! The density of the material determines whether something will float or sink.
For a certain thing to float, it depends on the mass, weight and the size, . The lighter and smaller a thing is, the more its likely to float. The heavier an object, the more it is likely to stay on the ground. An object can float(or sink) in water, or even in the sky.
Things that float have a smaller density than water and things that sink have a larger density than water. Because a stone is heavy for its size it sinks but although a ship is heavier its mass is spread out over a larger area so its density is smaller and therefore it floats.
Because the marble has a lesser density than water. And also because of the marbles shape and size. :)
Answer: It doesn't matter about the size, it matters about the weight. If an beach ball weigh .2280 grams, and a golf ball weighs 1.258 lbs., the golf ball will sink but the beach ball will float. Even though the beach is bigger than the golf ball.
Objects whose average density (weight for size) is LESS than water will float, and will displace only the volume of water with a weight equal to its own weight. This is called "buoyancy." Substances like oil that are less dense will also float atop the water. Objects whose average density is, or *becomes* greater than the density of water will sink. Its buoyancy is not enough to prevent it from displacing the water and sinking, typically to the bottom. Dense substances like rock or metal also sink rather than float. Steel boats contain large air spaces below their waterlines. This makes their overall density less than water, even carrying heavy cargo. If, however, the boat springs a leak, and water takes the place of the air, the overall density increases and the boat may sink. A speedboat with foam between wooden hulls might not be able to sink at all, as the wood and foam (both less dense than water) might keep it afloat.
because if you are on a plane and it is over the capacity it could non-function. if it is a boat it will go slower, or if it's a old boat it will probably break down or sink.