# Tag Info

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The average density is the average amount of mass (which means materials and stuff) in a certain amount of space.In a simpler explaination it means how compact something is. All you must do is sink your car in water, see how much the water level rises, which would give you the volume and then you divide the mass of the car by the volume it displaces.I got a ...

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Since a car is made up of many different materials, which all likely have their own different densities, the density of the car is, therefore, not the same everywhere. The average density is the density such that, were the entire car to be that density, it would have the same volume and mass. It is very easy to figure out. The total mass of the car divided ...

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As long as the outlet tube has greater vertical depth than the inlet tube, the weight of falling gas in the outlet tube should maintain an area of decreased pressure at the top of the siphon which should keep the gas in the inlet tube from sliding back into the source pool, and a flow should be maintained. I don't see why this wouldn't work. The Wikipedia ...

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Thinking through the problem for water vapour to exist by nature a fixed volume will contain more energy in the form of heat. The heat displaces air molecules around it making the volume lighter as in a hot air balloon. The amount of atoms in the fixed volume in comparison with surrounding air is higher in the water vapour. I see water vapour as heavier in ...

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The image below represents the Sun's density gradient, which shows how the density changes with the radius. The ground we stand on should have a density between 2 to 3 $g/cm^{3}$. That should put you just above the water point on the vertical axis. The corresponding radius is then about 0.45 of the solar radius. Note that the vertical axis is in a ...

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As @KyleKanos point out, "the answer is a google search away", but it's not quite as simple as he suggests. The mean density doesn't answer your question (the mean density turns out to be about 1.4 times the density of water by the way). An ill-defined idea in your question is the "surface" of the sun. Where is the "surface" of the sun given that none ...

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It does seem odd that a star that isn't a black hole can explode, and therefore presumbly lose mass, and still form a black hole. The explanation is that to form a black hole requires a high density not just a high mass. Even a small object such as, well, you or I could form a black hole if compressed enough, though obviously in practice that level of ...

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This can be understood by showing in general where curvature come from. Spacetime can curve naturally all on its own even in empty space. Matter can connect together regions that have two different types of curvature. One possible type of curvature is the funnel shaped curvature outside a star or outside a black hole. As the star collapses inwards to for ...

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The general derivation of Pouillet's Law is given in https://www.academia.edu/1841457/The_Notion_of_Electrical_Resistance

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