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How do you account for the observed difference in hardness of different kinds of crystals?
The observed difference in hardness among various crystals can be attributed to their atomic structure and bonding types. Crystals with strong covalent or ionic bonds, such as diamond or corundum, typically exhibit higher hardness due to the strength and directionality of these bonds. In contrast, crystals with weaker van der Waals or metallic bonds tend to be softer, as these bonds offer less resistance to deformation. Additionally, factors like crystal lattice arrangement and the presence of impurities can also influence hardness.
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For many years TV executives used the guideline that 30 percent of the audience were?
165 = 33% ABC observed, 150/30% expected 140 = 28% CBS observed, 150/30% expected 125 = 25% NBC observed, 150/30% expected (500 less 430 is 70) 70 = 14% Cable observed, 50/10% expected Chi square test for goodness of fit (between the guideline and the sample) The Null is that the guideline and observed results have no significant difference, the Alternative is that they do have a difference. (3 degrees of freedom, 4 categories -1) gives a critical value of 7.82 at .05 significance The Chi test for this data is 14.32 so the Null is rejected and the Alternative is accepted.
When is world heritage day observed?
it is observed on the day of 18 april
What is volatility smile?
The volatility smile is a long-observed pattern in which at-the-money options tend to have lower implied volatilities than other options. The pattern displays different characteristics for different markets and results from the probability of extreme moves
When is anti pollution day observed?
3 December observed the anti pollution day
Marcellus and Horatio observed the ghost was?
Hamlet's dead father
How do you account for observed differences in hardness of the crystals?
Observed differences in crystal hardness can be attributed to variations in the arrangement of atoms within the crystal lattice, impurities present in the crystal structure, temperature of crystallization, and the presence of structural defects like dislocations or vacancies. These factors can affect the strength of interatomic bonds and influence the overall hardness of the crystal.
What is characteristic that can be observed?
the answer is hardness text me <3 xoxo
Why do different crystals have different colors?
Different crystals have different colors due to variations in their chemical composition and atomic structure. The way light interacts with these properties leads to the absorption and reflection of certain wavelengths, resulting in the observed colors. Impurities and defects in the crystal lattice can also influence its color.
What is The percent difference between an observed value and its actual value?
It is the observed error.
What structure can be observed that identifies a sample as a mineral?
Minerals are crystalline in structure. If you're looking at a solid object of inorganic origin, that occurs naturally, and it has crystals, the crystals are minerals.
Are isotopes different in terms of their chemical properties?
A difference of chemical properties is observed for light elements; for other elements these differences are extremely small.
What is a precipitate and when is it observed?
an insoluble sold formed in a chemical reaction that is taking place on a solution. Observed when the amount (concentration) of that substance is greater than its solubility. small crystals settel out in the container.
Does steel have a crystalline structure?
Yes steel can have multiple types of crystalline structure or "grain" structure. These structures can be changed by heating and cooling the steel in particular ways. This is not unlike how different temperatures and cooling speeds cause water to form different sizes and shapes of ice crystals, which can be readily observed in snow crystals. In steel, the properties of the alloy will be determined in large part by the crystal structure, like hardness, ductility, tensile strength. The manipulation of these crystalline structure through controlled heating and cooling is known as tempering, or heat treating.
Zinc has a hardness on the Mohs scale of 2.5 and a density of 7.13 at 25 is it physical or chemical change?
The hardness and density of zinc are physical properties, as they do not involve any change in the chemical composition of the substance. Changes in physical properties can be observed without altering the chemical identity of the material.
How many phases have yuou observed in mixtures of salt and water?
In mixtures of salt and water, typically two phases are observed: a solid phase of salt crystals and a liquid phase of water.
What the difference between a pie and tartlet?
The treatment effect is the difference between the observed outcome and the "normal" outcome
What is the difference between sowing and planting?
The treatment effect is the difference between the observed outcome and the "normal" outcome
