are the height of where the ball is dropped from. The independent variables of this investigation. The (dependent) variable that will be measured in this investigation is the bounce height of the dropped ball. This shall be observed with one person dropping the ball from above while another person watches the for the highest point the ball reaches. Three variables that could be affected within this investigation is the wind‚ where/how it bounces and the force behind the ball. To control these
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FormulaMolecular Weight (g/mol)Density(g/cm3)Melting Point(oC)Boiling Point(oC)HazardO-vanillinC8H8O3152.15-42.5265-266Harmful andIrritantFor all 3vanillinC8H8O3152.151.05680-81285isovanillinC8H8O3152.15-113-115179Vanillyl alcohol*C8H10O3154.17-113-115--Sodium hydroxide**NaOH39.992.13181390CorrosiveHydrochloric acidHCl36.461.18-26110CorrosiveSodium borohydrideNaBH437.831.074505400IrritantCorrosive*Vanillyl alcohol is soluble in cold organic solvents such as ether/alcohol and hot water‚ but insoluble in
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There are many components to any investigation‚ but behind any successful investigation there is a well written and detail report that describes every aspect of the crime scene. Field note are one of the most important and essential aspects to any successful investigation and to any finished report. Field notes should encompass the basic information such as name‚ date and time‚ and location. The notes should also include any observation of the officer’s surroundings such as‚ who was at the scene
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Lineups in criminal investigations has been the traditional form of identification for putting the focus on a specific suspect in a criminal case. Law enforcement agencies typically use three different types of lineups: field lineup‚ photographic lineup‚ and physical lineup. Field lineups take place shortly after a commission of a crime and the officers a have a suspect in custody and an eye-witness that is whiling to identify the suspect. The witness goes to the suspect’s location and asked if the
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A double displacement reaction is a type of chemical reaction in which two compounds react in order to create two new chemicals. The two cations and anions switch places with each other which forms two new compounds. As an example AB+CC can switch to AD+CB. Both sides of these equations must balance out in order to be neutral. So any pairs of compounds (such as A+B) must have a total balanced charge. In this example A could have a charge of positive 2 (+2) and B could have a charge of negative
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9.5 Tests for halogens and halide Ions Test for halogen Test method Test observations Test chemistry and comments Chlorine gas Cl2 A pungent green gas. (i) Apply damp blue litmus. (Can use red litmus and just see bleaching effect.) (ii) A drop silver nitrate on the end of a glass rod into the gas. (i) litmus turns red and then is bleached white. (ii) White precipitate. (i) Non-metal‚ is acid in aqueous solution and a powerful oxidising agent (ii) It forms a small amount of chloride ion in water
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INVESTIGATION 12.A Target Skills Determining the reactivity of various metals Testing Relative Oxidizing and Reducing Strengths of Metal Atoms and Ions By observing whether reactions occur between solid metals and metal ions in solution‚ you can determine the order of oxidizing and reducing agents according to strength. Question How can the presence or absence of a reaction provide information about the relative strength of oxidizing and reducing agents? Safety Precautions
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In solving a crime‚ a crime scene is usually imperative to the investigation. Documenting a crime scene helps to establish some of the evidence or rather investigative leads which may help solve the case. Additionally‚ the leads found in the crime scene can help solve the case or determine what happened. Poor scene documentation can prompt unacceptable evidence in a courtroom‚ or missed evidence that may permit a victim to escape with a crime. Photography is important during the documentation of
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approach‚ 3) the flight crew’s poor crew resource management‚ and 4) fatigue due to the time of day in which the accident occurred and a cumulative sleep debt‚ which likely impaired the captain’s performance. Recommendations As a result of this investigation‚ the National Transportation Safety Board makes the following recommendations to the Federal Aviation Administration: Require that role-playing or simulator-based exercises that teach first officers to assertively voice their concerns and that
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Crime scene investigation requires the handling all types of potentially hazardous material‚ from blood and other physical evidence collected at the scene to the chemicals and other materials used by technicians as they perform their jobs. Failure to follow established safety and health procedures regarding the handling and disposal of hazardous material exposes crime scene technicians and others to a variety of risks. Technicians collecting evidence at crime scene must handle a range of biological
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