the solution‚ regardless of what kinds of particles are present the greater the concentration of any solute‚ the lower the freezing point and the higher the boiling point of a solution. FREEZING POINT LOWERING A liquid begins to freeze when temperature is lowered to the substance’s freezing point and the first few molecules cluster together into a crystal lattice to form a tiny quantity of solid. As long as both solid and liquid phases are present at the freezing point‚ the rate of crystallization
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underneath a test-tube filled with water. The temperature rise gave an estimate of the energy released per gram. HYPOTHESIS If the weight of the food product is lighter then the temperature rise is greater and the energy content of the food product is higher. VARIABLES Independent Variable: Heat energy released by the food product. Dependent Variable: Temperature rise of the water. Controlled Variable: Amount of water. RESULTS After measuring the temperature rise‚ the energy released per gram was
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system is reduced (equivalent to an increase in pressure) then the equilibrium position shifts to increase the volume (equivalent to a decrease in pressure) * If the temperature of an endothermic equilibrium system is increased‚ the equilibrium position shifts to use up the heat by producing more products. * If the temperature of an exothermic equilibrium system is increased‚ the equilibrium position shifts to use up the heat by producing more reactants. III. Materials: Reagents:
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up of kinetic energy. It takes more energy to make large molecules vibrate than it does to make smaller molecules vibrate. Thus‚ sound will travel at a slower rate in the denser object if they have the same elastic properties. Temperature - Molecules at higher temperatures have more energy‚ thus they can vibrate faster. Since the molecules vibrate faster‚ sound waves
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In order to obtain the data‚ the DataStudio™ software is set up on the computer to use the temperature sensor on the apparatus to collect steadily the temperatures at specified time interval of 5-seconds. After the computer is completely set-up‚ the rest of the apparatus is collected. Water is added to the calorimeter until it is about 2-inches away from being completely full. In order to lower the temperature of the water‚ a few ice cubes are added. Once the ice is completely melted‚ the calorimeter
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Enzyme Activity Dependent Variable amount of product (glucose and fructose) produced Independent Variable pH Controlled Variables temperature‚ amount of substrate (sucrose) present‚ sucrase + sucrose incubation time Effect of Temperature on Enzyme Activity Dependent Variable amount of product (glucose and fructose) produced Independent Variable temperature Controlled Variables pH‚ amount of substrate (sucrose) present‚ sucrase + sucrose incubation time Effect of Substrate Concentration
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OBJECTIVE: - To determine the efficiency of the solar ray collector under various experimental conditions. 1. Illumination with halogen lamp. Water temperature θe≈ 20°C. a) Complete collector b) Collector without glass plate 2. Illumination with halogen lamp. Water temperature θe ≈60°C. c) Complete collector d) Complete collector‚ cold jet of air impinges e) Collector without glass plate f) Collector without glass plate‚ cold jet of air impinges
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Calorimetry Lab Report Waris Butt PHY 112 Mr. Fasciano Class #18336 06/08/14 Purpose: Heat flow will occur between objects in contact until no more heat flow is detectable. Using calorimetry to analyze heat flow quantitatively and the equation: Q = mc ΔT‚ to determine the specific heat capacity of an object and heat flow from or to an object; respectively. Materials: Circle K 44 oz Styrofoam cup with lid Large Plastic
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Operating Manual FocusPRO TH6000 Series ® Programmable Thermostat 69-1921EFS-03 Quick Reference Card Grasp and pull to see basic operating instructions at a glance. Battery Holder Press down and pull to remove batteries. Batteries should be replaced once a year (see page 17). ENGLISH MCR29456 This manual covers the following models: TH6110D: For 1 Heat/1 Cool systems TH6220D: For up to 2 Heat/2 Cool systems TH6320U: For up to 3 Heat/2 Cool systems (Remove battery holder
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1. Illuminuation Factors that affect the workers’ visual performance are visual angle‚ contrast‚ illuminance‚ glare and color. One way to improve the worker’s visibility is to improve direct lighting. Direct lighting however‚ deemphasizes the ceiling surface and places more of the light on the work surfaces and the floor. Direct-indirect lighting is a combination of both and is recommended in all work areas. Too much glare‚ or excessive brightness might also affect the worker’s vision. A table below
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