Research Question Investigate the effect of temperature on the rate of respiration of various parts of plants (germinating seeds and dormant (non-germinating) seeds)‚ by measuring the oxygen consumption and change in gas volume of respirometers containing either germinating or non-germinating seeds at different temperatures to measure the rate of respiration of these beans at different temperatures. Hypothesis 1.Germinating seeds have a higher rate of respiration as compared to non-germinating
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The altimeter shows the aircraft’s altitude above sea-level by measuring the difference between the pressure in a stack of aneroid capsules inside the altimeter and the atmospheric pressure obtained through the static system. It is adjustable for local barometric pressure which must be set correctly to obtain accurate altitude readings. As the aircraft ascends‚ the capsules expand and the static pressure drops‚ causing the altimeter to indicate a higher altitude. The opposite effect occurs when descending
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Objectives: 1. Distinguish between system and surroundings. 2. Distinguish between heat energy and temperature. Name the SI units of temperature and thermal energy. 3. Calculate the heat content (thermal energy) of a substance using its specific heat‚ temperature and mass. 4. Solve calorimetry problems. 5. Name the energy associated with a change of state and calculate the energy required to change a given mass of substance from solid to liquid or liquid to gas. 6. Describe the changes in the microscopic
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Enthalpy of Neutralization Introduction Energy changes always accompany chemical reactions. If energy‚ in the form of heat‚ is liberated the reaction is exothermic and if energy is absorbed the reaction is endothermic. Thermochemistry is concerned with the measurement of the amount of heat evolved or absorbed. The heat (or enthalpy) of neutralization (∆H) is the heat evolved when an acid and a base react to form a salt plus water. Eq. 1 HNO2(aq) + NAOH(aq) → NaNO2(aq) + H2O(l) + Q Q in the
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Simulink Cheng-Liang Chen PSE LABORATORY Department of Chemical Engineering National TAIWAN University Chen CL MATrixLABoratory 1 Chen CL Simulink 2 Chen CL 3 The Simulink Library Browser Chen CL 4 Simulink Solution of y = 10 sin(t) ˙ Check Results on Screen dy = 10 sin(t) dt 13 ⇒ y(t) = y(0) = 0‚ 0 ≤ t ≤ 13 (10 sin(t))dt + y(0) 0 Note: y(t) = 10(1 − cos(t)) (exact solution) Chen CL 5 Simulink Solution of y = 10 sin(t)
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one survey that asked migraine sufferers to list triggers‚ 53% responded "weather". The effect of changes in the weather on our health is undeniable. Just ask the severe rheumatoid arthritis patient about his joint pain during rainy days. Atmospheric pressure can be felt by those with achy joints or metal implants in their bodies. They can predict the weather better than some network television meteorologists. How can you be wrong when the atmosphere is in your bones‚ literally? In addition
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located in the equatorial with a low atmospheric pressure. There are light winds‚ variable winds‚ abundant cloudiness‚ and much precipitation. They are also breeding grounds for hurricanes. Secondly‚ there are the Horse latitudes located at 30 with high atmospheric pressure. There are light and variable winds. Fair weather with little precipitation and goes across the major deserts of the world. Next‚ there are the Polar fronts located at the 60 with low atmospheric pressure. There are variable winds
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1. Energetics si ygrene neht srucco egnahc yplahtne na fI dna )rH In an exothermic change energy is transferred from the system (chemicals) to the surroundings. The products have less energy than the reactants In an endothermic change‚ energy is transferred from the surroundings to the system (chemicals). The products have more energy than the reactants Enthalpy changes are normally quoted at standard conditions. Standard conditions are : • 1 atm pressure • 298 K (room temperature or 25oC) • Solutions
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2011 CHAPTER 3: FORCES AND PRESSURE 3.1 Pressure Units of pressure Unit Note Pa SI unit N m-2 Equivalent to Pa N cm-2 cm Hg m water atm 1 atm = atmospheric pressure at sea level bar 1 bar = 1 atm Pressure is the force which acts normal per unit area of contact. P= F A where P = pressure [Pa] F = force [N] A = area [m2] For atmospheric pressure only 3.2 Pressure in Liquids Pressure in liquids are not dependent on the size or shape of the container; only on its depth. P = hρ
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you understand: • • • • • • • The Atmosphere Atmospheric Pressure The Barometer Boyle’s Law Buoyancy of Air Bernoulli’s Principle Plasma © 2010 Pearson Education‚ Inc. The Atmosphere Atmosphere • Ocean of air • Exerts pressure The Magdeburghemispheres demonstration in 1654 by Otto von Guericke showed the large magnitude of atmosphere’s pressure. © 2010 Pearson Education‚ Inc. Atmospheric Pressure Atmospheric pressure • Caused by weight of air • Varies from one
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