0
What else can I help you with?
Why must each point have a curve in a cooling graph?
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.
Compared to a bar of pure gold what is the density of a pure gold ring?
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.
Do metals expand when they are cooled?
No, most substances contract with cooling, only some exotic substances (eg water) expands when cooled.
Which 3 solids contract on cooling?
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.
Why are pure metals shiny and reflect light?
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.
Heat and cooling curve of pure water?
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.
What is the difference between a heating curve and a cooling curve?
heating curve is hotter than the cooling curve
What shape is a Cooling curve graph?
A Cooling curve graph changes shape.
What is the demand curve faced by a pure monopolist?
The demand curve faced by a pure monopolist is of downward sloping in shape.
Why are some metals found as pure metals and some metals are not found as pure metals?
because u have to with some metals make a mixs ture so there
The nondiscriminating pure monopolist's demand curve is the industry demand curve.?
yes
What is refining of metals?
Preparation of very pure metals.
Are alkali metals always found pure in nature?
Alkali metals are not found as pure elements in nature.
How does the time temperature cooling curve of an alloy of eutectic composition different from that of a pure metal?
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.
How are pure metals held together?
Metals have metallic bonds.
How does surface area affect the cooling curve?
put it in the fridge
How does the elasticity of the monopolistic competitor's demand curve compare to that of a pure competitor or a pure monopolist?
A monopolistic competitor's demand curve is less elastic than apure competitor's which is less elastic than a pure monopolist's.
