LM35 Precision Centigrade Temperature Sensors The LM35 series are precision integrated-circuit temperature sensors‚ whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear temperature sensors calibrated in ˚ Kelvin‚ as the user is not required to subtract a large constant voltage from its output to obtain convenient Centigrade scaling. The LM35 does not require any external calibration or trimming
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Determining the enthalpy change for the thermal decomposition of potassium hydrogen carbonate into potassium carbonate. Controlled Variables: 1. Volume of HCl ± 0.5 cm3 (± 2%) 2. Concentration of HCl‚ 3. Same mass of K2CO3 and KHCO3 within specified ranges of 2.5 – 3.0g and 3.25 – 3.75g respectively 4. Same calorimeter used i.e. polystyrene cup is used in this experiment 5. Same thermometer will be used ± 0.10K 6. Same source of K2CO3‚ KHCO3 and HCl Raw Data Results: The raw
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Introduction: Biology is the science of life and thus one of the many sciences that are part of everyday life. Diffusion and osmosis are processes that are a constant in our lives‚ even though many don’t realize it. Medicaments such as Fervex can be drunk only after diffusion has taken place and the powder granules have diffused into the hot cup of water. On the other hand‚ every day we become unintentional witnesses of osmosis when the roots of the plants try to suck up the water from the soil
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The purpose of the following study is to determine where the two unknown bacteria acquired in Microbiology lab should be classified in regards to temperature‚ pH level‚ and osmoregularity. It is important to classify bacteria in order to identify them. Identification of bacteria is important because they are not only useful but potentially dangerous as well. The identification of bacteria can lead to breakthroughs in healthcare regarding treatment of old and new diseases alike. Identifying bacteria
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Introduction Specific heat is defined as the measure of the ability of a substance to change temperature. Specific heat of a substance is the heat needed to change the temperature of 1 gram of a substance once degree Celsius. The more Joules (unit of heat) needed‚ the higher the specific heat will be. The goal is to determine specific heat of a soil sample as compared to water. This difference has many ramifications regarding our climate‚ with local and global. Hypothesis I predict that after
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GMAT Test 2 – Copyright 2005 by Hp Group (www.hp-vietnam.com). All right reserved. GMAT TEST 2 – MATH SECTION (37 questions‚ 75 minutes) 1. X is an even number and Y is a positive odd number. Which of the following expressions cannot be even? (a) (b) (c) (d) (e) (XY) Y X3Y3 X3 XY Y2 2. How much interest will $2‚400 earn at an annual rate of 8% in one year if the interest is compounded every 4 months? (a) (b) (c) (d) (e) $141 $150 $197 $234 $312 3. What is the value of P? (1) P is even. (2) P
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Energetics Practical 2: To Determine the Enthalpy Change of a Reaction Background Calcium Carbonate‚ CaCO₃‚ decomposes with heat to form CaO and CO₂. The objective of this practical was to determine the enthalpy change for this reaction by using an indirect method based upon the foundation of Hess’ Law. Both calcium oxide and calcium carbonate react readily with 2 mol/dm3. The reaction can be demonstrated as so: CaCO₃ (s) -> CaO(s) + CO₂ (g) Results: Raw Data Calcium Carbonate Mass of CaCO₃
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Case study 1 i. Five possibilities that cause food poisoining that occurred during the wedding based on the Case Study. a. Time interval The food that has been cooked early in the morning that is at 10:00 to 11:00 am and it is been served between 1:30 to 3:30 p.m. That almost took as long as 4 hours. This cause the food spoiled and stale as the food has been stored long. b. No covers for the containers of raw food Microorganisms require nutrients to grow. Raw food has a moisture condition
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Charles Law IA Temperature of Water (0c) +-20c | Volume of Gas (ml)+- 1ml | Total Volume(ml)+- 1ml | 17 | 0 | 250 | 27 | 10 | 260 | 37 | 21 | 271 | 47 | 29 | 279 | 57 | 36 | 286 | 67 | 43 | 293 | 77 | 51 | 301 | 87 | 57 | 307 | 97 | 68 | 318 | This was our original graph‚ it was before we made the trend line go back 311 points to find where the graph intercepts the X axis. As you can see there are little or no error or anomalies in this data and the R2 value came out to be
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1. For each of the following‚ indicate which is a variable and which is a constant: a. The number of minutes in an hour. Constant b. Patients’ systolic blood pressure. Variable c. Pi (π) – e.g.‚ for finding the circumference of a circle. Constant d. College students’ level of depression variable 2. For each of the following research questions‚ identify the independent variable IV “and” the dependent variable‚ DV: Does a person’s age affect psychological adjustment following burn
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