Absorption Spectrum of a Conjugated Cyanine Dyes Introduction Since cyanine dyes have a long conjugation in its structure, these structures have been known to have several functions that include light-energy conversion, nonlinear optics, sensitization2,3, aggregation3, etc.2 Cyanine dyes are particles with a positive charge in its structure delocalized through a string of double bond carbons with amino end groups.1, 2 In this experiment, three solutions of cyanine dyes were studied through spectroscopy
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Experiment Aim: To find the specific heat capacity of three different metal using the method of mixtures. Specific Heat Capacity – It is the amount of heat (thermal) energy required to cause a rise in temperature by 1°C in a solid of 1kg. Apparatus: 1. Metal cubes (3) 2. Beaker 3. Water bath 4. Thermometer (L.C. 1°C) 5. String 6. Digital Balance Risk Assessment: 1. Wear a lab coat to prevent any substance from falling you and potentially harming you.
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Problems for February 23, 2000 Problem 2. Microwaves in a microwave oven are produced by electrons circling in a magnetic field at a frequency of 2.4 GHz. a) What is the magnetic field strength? b) The electrons’ motion takes place inside a special tube called a magnetron. If the magnetron can accommodate electron orbits with a maximum diameter of 2.5 mm, what is the maximum electron energy? Problem 3. An electron moves in a circular path perpendicular to a constant magnetic
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Toronto Collegiate Institute SPH 3U1 Practical Examination Specific Heat Capacity of TCI Tap Water Date: 14th July 2014 Title: Specific Heat Capacity of water Purpose: To find the specific heat capacity of TCI tap water Hypothesis: I hypothesize that the specific heat capacity of water will be 4200 J/kg°C because water is known to have a high heat capacity Apparatus: * Top Pan Balance * Kettle * Alcohol Thermometer * Pencil * Paper * Water Procedure: 1. Record
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position. Wave produced by a vibrator travels down a string and reflects back along the string on reaching the fixed end of string, and a wave is often characterized by its wavelength λ, speed v and frequency of oscillation f which are related by the fundamental equation of wave motion λf = v. The speed v, of a wave depends on the tension F, in the string and its linear mass density µ, and this is given by the equation v = {√F/µ}. The stronger the force
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Roger Truong Week 4 Physics Notes Experiment 1 * Rise and fall is pressure in the sound wave makes the flame move * The rise and fall in pressure makes the click sound * The rise and fall in the disturbance to what brings the sound to your ear * The square waves to what makes the flame move and bring the sound to your ear * The air molecules don’t move the disturbance does * For a 0.5 Hz your hear a click and the flame moves and resets * For 100 Hz the flame remains
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Physics pre-assessment research task 1. Describe de Broglie’s proposal that any kind of particle has both wave and particle properties De Broglie suggested that if light can behave as both a wave and as a photon, particles could also have dual character. He proposed that all particles had wave properties as well as particle properties. He proposed that the wavelength is inversely proportional to the momentum of the particle, now known as the de Broglie wavelength of a particle and given by,
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1 ) Explain how kinetic energyand potential energy determine the properties of the three states and phase changes, what occurs when heat is added or removed from a substance and how to calculate the enthalpy change. Answer In a gas, the potential energy (energy of attraction) is small to the kinetic energy thus, on average, the particles are far apart. This large distance has several macroscopic consequences : a gas fills its container, is highly compressible, and flows easily through another gas
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| UVA (mw/m2) | UVB (MW/m2) | | | IO | 59 | 263 | | | | | | UVA | UVB | Color | Thickness | | Average Attenuation Coefficient | Average Attenuation Coefficient | Green | 0.12 mm | 0.205 mm | 1661/m | -143. 9/m | Maroon | 0.13 mm | 0.25 mm | 1356/m | 1681.231 /m | Activity 1: Table 1:Initial Intensity In this activity, we measure first the initial intensity of UVA and UVB without the umbrella. We also measure for the thickness of two umbrellas, choosing the green and maroon
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Figure 2: Stress- strain graph The stress strain relation dependent on time and time-depending behavior of materials is known as visco-elasticity. This term derived in two expressions: Viscosity and Elasticity, Elasticity is about solid whereas Viscosity resistance to flow in fluids. Therefore, this type of material is a combination of fluid and solid properties which presents a following relation
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