Go to http://phet.colorado.edu/simulations/sims.php?sim=Motion_in_2D and click on Run Now. 1) Once the simulation opens‚ click on ‘Show Both’ for Velocity and Acceleration at the top of the page. Now click and drag the red ball around the screen. Make 3 observations about the blue and green arrows (also called vectors) as you drag the ball around. The vectors appear to have both direct and inverse relationships with each other. When I move the ball one direction‚ both of the vectors move the
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ROTATIONAL MOTION CENTRE OF MASS AND ROTATIONAL MOTION INTRODUCTION- For describing the motion of rigid bodies‚ we shall introduce the key concept of ‘centre of mass’. This concept enables us to understand how we can apply justifiably the Newton’s laws of motion‚ in essentially the same form to objects of large size including even the astronomical objects like the planets and the stars. KINDS OF MOTION OF A RIGID BODY- A rigid body may have three kinds of motion- (1) Pure Translation Motion- in such
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Board of Directors‚ Paducah Gaseous Diffusion Plant/Department of Energy FROM: Kathleen Hayes‚ Consultant for Paducah Gaseous Diffusion Plant/Department of Energy DATE: 17 November 2012 RE: Notification of Potentially Hazardous Working Conditions and Worker Health Introduction Ethical and moral issues have been brought into question when determining the proper protocol when informing employees of potential health risks while on the job. Paducah Gaseous Diffusion Plant and the Department of Energy
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Projectile Motion You have probably watched a ball roll off a table and strike the floor. What determines where it will land? Could you predict where it will land? In this experiment‚ you will roll a ball down a ramp and determine the ball’s velocity with a pair of Photogates. You will use this information and your knowledge of physics to predict where the ball will land when it hits the floor. [pic] Figure 1 objectives * MEASURE THE VELOCITY OF A BALL USING TWO PHOTOGATES AND
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of different concentrations of saline solution on Red Blood Cells. When a Red Blood Cell is submersed in a high concentration of saline solution it will create a hypertonic environment and therefore cause the cell to rupture due to the process of osmosis. The methods used to collect data were observation and note taking. Overall the results proved the hypothesis correct with major findings being a higher concentration of salt causing a hypotonic environment and a low concentration. Recommendations
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Joanna Packham ENG 111 Reverse Osmosis in Our Life My husband and I installed a reverse osmosis drinking water system in our home. I have traveled a lot recently and met lots of people including engineers on the yachts that thought me a lot abut reverse osmosis systems. They explained to me that RO are declining in popularity because they remove the minerals as well the impurities from the water. Long-term consumption of filtered water had negative health effects. I was asking myself is RO water
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Case Analysis 2 – Research in Motion - RIM: Research the history of RIM‚ specifically with an eye toward product development Introduction Research in Motion‚ or RIM‚ is a Canadian multinational telecommunications company based in Waterloo‚ Ontario‚ Canada. Founded in 1984‚ by Mike Lazaridis‚ an engineering student at the University of Waterloo‚ and Douglas Fregin‚ an engineering student at the University of Windsor. For years the company tinkered in obscurity‚ until it focused on a breakthrough
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Natalia Wierzchon A.P. Biology Lab: 1. Osmosis 09/10/2010 I. Introduction a. Purpose: The purpose of this lab was to observe the diffusion process of water‚ osmosis‚ as well as create an understanding of water potential‚ the basis of osmosis. The experiment proved how water molecules in a solution are able to move from an area of low solute concentration‚ high water concentration‚ to an area of high solute concentration‚ low water concentration‚ diffusing “down” the water gradient.
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The Effect of Concentration Gradient on Osmosis Abstract: Osmosis is the passive movement of water from an area of higher concentration to an area of lower concentration‚ usually across a membrane (Thorpe 2013). Tonicity is the ability of a solution surrounding a cell to gain or lose water (Reece 2011). There are many factors that affect the rate of osmosis. These include temperature‚ surface area‚ difference in water potential‚ pressure‚ light and dark and most importantly what we will be talking
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The effect of salt concentrations on the mass of the pear cubes ‘Pyrus’ after being soaked in water Aim: The effect of salt concentrations on the mass of the pear ‘Pyrus’ pieces shaped as cubes of 1cm. Background: Osmosis is the net movement of water molecules through a semi-permeable membrane from an area of higher water potential to an area of lower water potential. Water makes up to 70-90% of living cells and cell membranes are partially permeable membranes. Dissolved substances attract
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