The first questions we must answer are: Is all proof matter? What is matter? just how do us classify and collect the issue that matters?

In invernessgangshow.netistry together in most sciences, matter is defined as something that has mass and also takes increase space. Issue can as such be weighed and measured and also the numbers produced analyzed and also compared because that the services of proof or research. Once we measure the issue we will use, that is vital to monitor the rules of collection and computation that store the measurements in a type that is qualified of comparison. What I typical by this is the you can�t weigh an item on a scale capable of only measuring come the 0.1 gram however report it come the 0.001 gram. That would be claiming a degree of precision the does no exist in the measurement. The use of far-ranging figure rule will store us native making this type of mistake. We likewise need to realize that some of the proof we will certainly collect both in research and in forensic investigation is not in truth matter. Observations, while no a type of issue are of substantial value as soon as investigating. Observations autumn under a kind of data dubbed qualitative data and also are simply as essential as quantitative (measured or calculated) data.

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Qualitative data is the observations investigator makes. While spatu in nature, this observations have value due to the fact that they often will help an investigator early decide what proof to collect or the basic direction an investigation should go. Arsenal of qualitative data might include surveying witnesses or suspects, taking pictures of crime scenes or objects left in ~ a crime scene, etc. Due to the fact that of the subjective nature of the data, over there is more difficulty in to compare the results. We regularly say that data that this nature have the right to be used to type a consensus yet never an absolute answer such together we would gain in quantitative data due to the fact that of the worries with reproducibility.

Quantitative data is the collection of numbers. This numbers could be life counts like exactly how many people were existing at a party or they might be measurements like the mass of an apple. The benefit to quantitative data is that is deserve to be reproduced and also is non-subjective in nature. This means if several various investigators attempted the measure they must all concerned the very same answer in ~ the typical deviation that the data.

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Main Points

Qualitative research involves evaluation of data such as words (e.g., from interviews), pictures (e.g., video), or objects (e.g., one artifact).

Quantitative research involves evaluation of number data.

There space strengths and also weaknesses of both qualitative and quantitative investigation.

Overly focusing on the controversy of "qualitative matches quantitative" frames the approaches in opposition. The is essential to focus additionally on just how the techniques can be integrated, such together in mixed approaches research. More great can come of developing an abilities in both worlds than debating which an approach is superior.

We currently defined the terms physical and also invernessgangshow.netical properties of matter in the first lecture, now we will continue with further defining the properties of matter. We deserve to start with the state intensive properties versus considerable properties. Intensive properties are those properties of matter that do not depend on the quantity of the substance that is present. A perform of few of the most common intensive nature is presented here:

Intensive properties of Matter

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Color

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Odor

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Luster

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Boiling Point

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Hardness


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Malleability


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Ductility


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Conductivity


Gary, Please affix the definitions listed below to the photos as rollover or pop-up boxes.

Color - the wavelengths of irradiate as regarded by the human being eyeOdor - the residential or commercial property of a substance the activates the sense of smellLuster - exactly how shiny a substance is. Boiling Point - The temperature in ~ which the vapor push of a liquid is equal to the press on the liquid (generally atmospheric pressure). Hardness - How easily a substance can be scratched.

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Malleability - The ability of a problem to be beaten into thin sheets. Ductility - The capacity of a substance to be attracted into slim wires. Conductivity - The capacity of a problem to enable the flow of power or electricity. Density - The fixed of a substance split by that is volume Pressure - the force applied per unit area the a problem

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Note that all of these properties (like the example of thickness above) can be measure up or calculated and also thus autumn under the realm of quantitative data. If you can not think of shade as being a number, that in reality can be measured using a spectrometer and the wavelength that the shade determined. Odors also are not immediately thought of in terms of numerical data yet are in truth gaseous molecules that deserve to be measure up by massive spectrometry to yield the percentages of every component compound by mass.

Extensive properties room the an ext commonly measured physics properties the matter and also are dependence on the quantity of substance present. Note below that mass and weight are listed as different items back we often use the two terms interchangeably. As lengthy as we are on Earth, the mass and also weight of an object are the same. If we relocate to the moon or Venus, the mass of an item will continue to be the same however the weight will change. A human being weighing 150 lbs on earth would just weigh 24.9 lbs on the moon and also on Venus, 136 lbs. Therefore although the mass remains 150 lbs the load changes based on the heaviness of the planet. Other measurements like volume and length will certainly be the very same no issue where they are taken.

Extensive - Properties that do depend on the lot of issue present:

1) mass or Weight

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Difference between Mass and also Weight


Mass - A measure up of the lot of issue in things (grams). Weight - A measure up of the gravitational pressure of attraction of the planet acting on one object.

2) Volume: