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2020 Q1 GDP (billions of 2010 NZ Dollars) 63.8 2020 Q1 GDP
Second opinion] 2020 Q1 GDP (billions of 2010 NZ Dollars) 63.8 2020 Q1 GDP (billions of 2020Q1 NZ Dollars) 79.2 2020 Q2 GDP (billions of 2010 NZ Dollars) 57.5 2020 Q2 GDP (billions of 2020Q2 NZ Dollar… read more
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2020 Q1 GDP (billions of 2010 NZ Dollars) 63.8 2020 Q1 GDP
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Introduction In class we learned that every material can
Introduction In class we learned that every material can have a charge. These charges can be either “negative” or “positive”. The origin of this charge is the atoms which make up a material. These charges exert forces on one another. In the case of the two points charges q1 and q2 at a distance r away from each others, the Coulomb Law gives the force as F = k q1 q2 r2 where k = 8.99 × 109 Nm2/C2 is the Coulomb constant. Provide your answers using Blackboard. 1 – Coulomb's Law Open the simulation and select Macro Scale (https://phet.colorado.edu/sims/html/coulombs-law/latest/coulombs-law_en.html) Set the charges q1 = 0 μC and q2 = 5 μC 1. What is the magnitude of the force on q1 by q2 ? (N) 2. What is the magnitude of the force on q2 by q1? (N) Set the charges to be q1 = 10 μC and q2 = 5 μC 3. What is the magnitude of the force on q1 by q2 ? (N) 4. What is the magnitude of the force on q2 by q1? (N) 5. Do the two forces have the same direction? 6. Is charge q1 attracted to q2 or repelled? Keep the charges at the same values as the previous question. If you click on either person you can change the distance between them. 7. What happens to the magnitude of the force as the charges are brought closer together? Leave q1 at the same charge value but now change the charge q2 = -5 μC 8. Is the force between the charges attractive or repulsive? 9. What happens to the magnitude of the force as you bring the charges closer together? 10. Set the distance between the two charges to 6 cm. What is the magnitude of the force? (N) 2 – The Coulomb Constant The goal of this experiment is to measure k. We could do this hypothetically by attaching a force senors to two large spheres each with a fixed charge on them where we fix the second charge in place but we let the first charge move. If we measure the distance between these two spheres and the force between them then we can determine k. This might look something like this Suppose that you do this experiment in the lab with q1 = 5 μC and q2 = 6 μC you find the following data (where cN is centi-newtons i.e. 10-2N) r(m)1 2 3 4 5 6 7 8 9 10 F (cN) 23.634 5.601 1.374 1.120 1.069 1.018 0.275 0.270 0.359 0.275 If we plot this as a function 1/r2 then the graph takes the familiar form of a line y = mx 222 wherey=Fandx=1/r.Firstcalculate1/r andthenmaketheplotofFvs1/r.Tomake the plot use Excel or LibreOffice (free software ) or what you prefer. 11. What is the slope m of your plot? (Nm2) 12. What is the experimental value of k? (GNm2/C2)(use the slope and the values of the given charges) 13. Find the % error of your result. … read more
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