LAB EXERCISE: Diffusion and Osmosis Laboratory Objectives After completing this lab topic‚ you should be able to: 1. Describe the mechanism of diffusion at the molecular level. 2. List several factors that influence the rate of diffusion. 3. Explain why diffusion is important to cells. 4. Describe a selectively permeable membrane‚ and explain its role in osmosis. 5. Define hypotonic‚ hypertonic‚ and isotonic in terms of relative concentrations of osmotically active substances. 6. Discuss
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AP Biology Osmosis and Diffusion Lab I. Introduction: Diffusion is vital to many life functions of a cell‚ it allow the transportation of vitally important nutrients and compounds without the expenditure of excess metabolic energy. To explain diffusion‚ it is as if a bottle of perfume is opened at one end of the room‚ then in a short amount of time a person at the other end of the room can detect the scent of the perfume; this is the process of diffusion. Diffusion is a movement from a higher
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Coefficient of Linear Expansion Introduction With few exceptions materials expand somewhat when heated through a temperature range that does not produce a change in phase (i.e. melting‚ freezing‚ boiling etc.). The added heat increases the average amplitude of vibration of the atoms in the material‚ which increases the average separation between the atoms. Although this effect is small‚ it is very important in any application that involves using different materials in an environment where they
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think about 1000 radial stations are required for a converged calculation. 2) The first plot is of a rotor with linear twist showing the lift coefficient variation with rbar in hover. The second plot is the lift coefficient max along the radius which looks to be about 1.2. The maximum thrust of the rotor in hover in terms of thrust coefficient is 0.0183. Cpo = 2.5668e-004 Cpi = 0.0020 Cpt = 0.0022 Cpideal = 0.0017 Fig Mer = 0.7832 MATLAB CODE: First Code: This
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therefore‚ it would take longer for a person to decide to call for help and the longer span of time taken can lead worse injuries and even the death of those involved in the accident. An experimental research study that would help test whether diffusion of responsibility is present
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Coefficient of Kinetic Friction Objective: After completing this experiment‚ you should be able to measure the coefficient of sliding friction of an object that is located on an inclined plane. Apparatus: Inclined Plane Pulley attachment for plane Wooden blcok‚ with hook attached Meterstick Felt Set of masses String Protractor Procedure: 1. Place the board in the position shown in Figure 7-1. 2. The angle of the board should be small enough so that the wooden block will not slide
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Mr. Reeves Page 1 Cultural Diffusion in the Ancient World Throughout history‚ cultures have mixed all over the world‚ changing beliefs‚ creating new ones‚ and changing the way people look at the world along with their existence. This can be proven from anything from music to food‚ but is especially prevalent in world religion and the way that every culture sees their god‚ or gods‚ and how they think‚ worship‚ and even obey‚ in similar manners. Even though Hebrew conceptions differed from the rest
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An Introduction to Gas Exchange Lecturer: Sally Osborne‚ Ph.D. Department of Cellular & Physiological Sciences Email: sosborne@interchange.ubc.ca Useful link: www.sallyosborne.com Required Reading: Respiratory Physiology: A Clinical Approach‚ Shwarrtzstein & Parker‚ Chapter 5 (pp 95-100; 111112). Objectives 1. Distinguish between the following terms: minute‚ alveolar and dead space ventilation; and anatomic‚ alveolar and physiologic dead space. 2. Specify the partial pressures of CO2 and O2
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Thomas Graham studied the behavior of the diffusion of gases of unequal densities when placed in contact with each other‚ using air as his control. He wanted to numerically prove how the diffusion of the gas volumes was inversely proportional to the value of the density of the gas‚ under constant temperature and pressure. The significance of this experiment was that in led to a reevaluation of the concept of the movement of matter‚ realizing that diffusion dealt with small immeasurable elements of
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Factors Affecting Diffusion How does temperature affect diffusion? What is Diffusion? Definition 1: Diffusion is a process where by molecules move from an area of high concentration area to an area of low concentration. Definition 2: Diffusion is an evidence for moving particles. The spreading out of a gas is called diffusion and it takes place in haphazard and random way. Gases diffuse because the particles collide with other particles and bounce of in all directions. For example when
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