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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.
What else can I help you with?
What are two substances that will float on water?
Oil and wood are two substances that will float on water due to their lower density compared to water.
What substances will float in water?
oil
Why don't mostsubstance float in air if they float in water?
It is waters greater density than air that allows some substances to float on water.
Does adding certain substances to water make boats float better?
Yes, if it makes the water denser, the boat will float easier. For example, it is easier to float in salty water.
Which soild substances will float in water?
Wood and styrofoam, to name two.
What are the substances that float in water?
Substances that float in water typically have a lower density than water. Some examples include wood, oil, plastic, and cork. These substances are able to displace enough water to generate an upward buoyant force that keeps them afloat.
Why do most substances float in air if they flow in water?
I suspect that "flow" is meant to also be "float", but even with that substitution, it just changes the question from nonsensical to counterfactual.Most things that float in water do not float in air.
What can float on water?
Any object with a density lower than 1 g/cm3.
Would a human finger sink or float?
A human finger would generally float in water due to its density being lower than that of water. However, factors like oil or other substances on the finger could affect this.
Will alcohol sink or float?
Alcohol is less dense than water, so it will float on top of water. However, if the alcohol is mixed with other substances that increase its density, it may sink.
Does fire float on water?
Many combustible substances (substances that will burn) are lighter (less dense) than water and will float - paper, wood and gasoline are a few examples. When ignited (set on fire), these substances will continue to float, and so will the fire.
What substances float on oil?
All materials with a density greater than the density of this oil.
