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Concept of energy variation during phase change

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Overview         (For age - group : Below 16 )

The educational animation covers concept of density in detail. It shows the measurement of density of solids, liquids and gases and variation of density with altitude, ambient temperature. Detailed explanation provides answers that are generally not found in textbooks. This K8-k12 animated topic gives in-depth information about density.

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 Size/Duration Subscribe Preview / Trailer Size (KB) 501 US\$    1.50 Rs.118.50  Check price in your currency Subscription Days = 30 Watch a preview (opens in separate window) Duration (hr:min:sec) 0:25:0 Add To Cart

 Concept of Density Content : Educational science software Type : Animation Duration : 25 minutes Topics Covered : What is density ? Why is iron denser than water? Is ice rarer or denser than water ? Formula for density SI units of density Density of some substances Variation of density with phase change Why is density of solids is greater than liquids ? Measuring density of solid, liquid and gas Variation of density with temperature Why hot air balloon rises ? Variation of density with altitude Explanatory Notes contain: Will density be the same on the Moon? Will the density vary with pressure variation? Why does density vary with volume? Why is gold heavier than lead? As there is no mass in space, is the density of space = 0 ? Why density of ice is less than that of water? What are the forces involved in the binding of matter?
Snapshots
 Change of density occurs with change in phase Explanation of why density changes with change in temperature Measurement of density of a gas shown though an elaborate experiment, where the formula is explained in detail Measurement of density of a liquid Detailed explanation at molecular level of why density changes with altitude
Details of the animation/ movie /software

Density is a confusing concept .The animation contains a visual explanation of density and explains the daily phenomena of life like why a balloon filled with warm air rises but a deflated one falls down, it gives a rigorous explanation of density supported by examples. This educational animation will clarify most doubts about density.

Density is calculated as mass divided by volume. It is usually measured in kilograms per cubic meter. It measures the weight corresponding to size of any object. In other words, it describes the degree of compactness of a substance. More closely packed together the atoms of an element or molecules of a matter the denser that matter would be. Since different substances have different densities, density measurements therefore can be used in identifying substances.

The mass divided by volume formula holds true for liquids, the density of a solid or gaseous material changes with volume for the given weight. This can be visualized when melting of wax or sugar occurs, the volume changes as state changes. Similar confusion occurs when ice melts to water.

Questions that are answered in the animation are:
How does the phase change in substance affect its density?
What is density?
Will density change on moon?
Which is denser water or ice?
How is density of solid, liquid and gas measured?
Why density of solids is more than liquid and gases?
Change of density with temperature
Change of density with altitude.

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