CUBoulder PHYS 2020  Lecture Notes (7 pages)
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Lecture Notes
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 7
 School:
 University of Colorado at Boulder
 Course:
 Phys 2020  General Physics 2
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SET YOUR iCLICKER to Frequency CC 1 Press and hold the power button until the blue light blinks then release 2 With the blue light blinking press CC press the C key twice Watch for the green light Blue light will stop blinking 3 Your clicker is now set to frequency CC and you are ready to vote 4 Do not turn off your clicker or you will have to reset frequency at next question Question Did you correctly set your clicker to frequency CC A Yes I am able to vote B No I can t vote How am I supposed to vote B when I can t vote Survey Question What was your last physics course A I took PHYS2010 last semester B I took PHYS2010 or PHYS1110 at CU but not last semester C I took a College level Physics 1 class some place other than CU D I placed out of College Physics 1 with AP credit E I never took a Physics 1 course Holy Mackerel I m in the wrong course Have you ever used CAPA online homework before A Yes B No Q16 1 Two uniformly charge spheres are attached to frictionless pucks on an air table The charge on sphere 2 is three times the charge on sphere 1 Which force diagram correctly shows the magnitude and direction of the electrostatic forces on the two spheres A B C D E Q16 2 A charge Q is fixed in space A second charge q is brought a distance r away Then q charge is removed and another charge 2q is brought a distance 2r away Then the 2q charge is removed and a charge 5q is brought a distance 2r away Q Which charge feels the largest force q r A q Q 2q 2r 2r C 5q D Two of the charges feel the same size force 5q Q B 2q Q16 3 ur ur ur ur ur Two vectors A and B are shown Consider the vector sum C A B ur What is Cy the y component of C y A 3 A x B 2 B C 2 D 4 E None of these don t know Q16 4 An electric dipole consists of two equal and opposite charges q and q separated by some fixed distance l A charge Q is brought near the dipole and is positioned so that the distances to the q and the q charges are identical as shown below A Q D q q B C E Some other direction What is the
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