i dont really know it might be H20 aka water but its probably a chemical
In a cooling graph, each point represents a specific temperature measurement over time. The curve connecting these points helps to illustrate the rate at which the temperature is changing, showing how quickly or slowly the object is cooling down. The curve also accounts for any fluctuations in the cooling process, providing a more accurate depiction of the overall cooling trend.
The density of a pure gold ring would be slightly lower than a bar of pure gold because pure gold rings often contain other metals like copper or silver in their alloy. The addition of these metals decreases the overall density of the ring compared to pure gold.
No, most substances contract with cooling, only some exotic substances (eg water) expands when cooled.
Water contracts on cooling from 0°C to 4°C due to the formation of water molecules arranged in a hexagonal lattice structure. Ice contracts further upon cooling below 0°C as the molecules align into a more ordered arrangement. Most metals contract as they cool due to the decrease in thermal vibrations of the atoms in the crystal lattice.
Pure metals have a regular lattice structure that allows light to bounce off the surface uniformly, giving them a shiny appearance. When light hits the metal surface, it interacts with the free electrons in the metal, causing them to vibrate and re-emit the light. This reflection of light gives metals their characteristic shiny and reflective properties.
The heating curve of pure water shows that as heat is added, the temperature of the water rises until it reaches its boiling point at 100°C, where it starts to vaporize. On the other hand, the cooling curve of water shows that as heat is removed, the temperature decreases until it reaches its freezing point at 0°C, where it solidifies into ice.
heating curve is hotter than the cooling curve
A Cooling curve graph changes shape.
The demand curve faced by a pure monopolist is of downward sloping in shape.
because u have to with some metals make a mixs ture so there
yes
Preparation of very pure metals.
Alkali metals are not found as pure elements in nature.
Usually with a pure element, you only have atoms of that element, example element C. So whatever the phase may be (eg. solid or liquid), the composition will only consist of the C atoms. An alloy on the other hand has more than one composition. For this example, lets say that the alloy consists of element A and B. Both the pure elements and the alloy have different phases they can be in, but the alloy's phases will consist of A + B. If the metals were to be heated up and cooled down, looking at a phase diagram you would see the different phases the alloy and the pure metals are in at that particular temperature. Looking at a phase diagram steel as an example, alloy of Iron and Carbon, with say a .05 wt % carbon, you can heat it up past 910 degrees C to austenitize the alloy reaching the Austenite phase. Then following straight down the phase diagram you will see the different phases the steel achieves. With TTT curve, however, time is another variable to consider. The steel can be austenitized and rapidly quenched to a certain temperature and held at that temperature yielding a certain microstructure due to the phase it is held at. Long story short, TTT curve most likely applies to alloys, particularly steel, whose time dependence shape the microstructure. Most likely you won't find a TTT curve for a pure element because the microstructure will not be too affected by heat treatment.
Metals have metallic bonds.
put it in the fridge
A monopolistic competitor's demand curve is less elastic than apure competitor's which is less elastic than a pure monopolist's.