SHOW HINT Question 7 (1 points) (#798609) {Electrical Force) A glass rod with a net charge of 0.723 /C and a small square of silk cloth with a net charge of -0.660 uC, are separated by 12.0 cm. What is the magnitude of the attractive force between the two charged objects? You may approximate both objects as point charges. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here CHECK ANSWER No answer submitted 0 of Unlimited checks used SHOW HINTEnter answer here No answer submitted CHECK ANSWER 0 of Unlimited checks used Part d (1 points) What is the angle between vectors u and v, in degrees? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here No answer submitted CHECK ANSWER 0 of Unlimited checks used Part e (1 points) What is the (approximate) unit vector pointing in the same direction as u, ie what is u? Select the correct answer O (1.22, 1.63, -0.408) O (0.588, 0.784, Answer -0.196) Scroll to 2 T Top Questions Back Contents MacBook Pro59 PM (17 hours from now) Question 1 This question contains multiple parts. Make sure to read all the instructions and answer each part. Suppose we have two vectors, u - 3x + 4y + (-1)2 and v= 1x + (-1)y + 22. Note: (x, y, z ) are equivalent to ( i, j, k). Different sources may use either convention. Part a (1 points) What is the length or magnitude of u, formally written as |uf but often just u? Make sure to remember throughout our class that ALL vectors have positive magnitudes (or zero), no exceptions. Any question that asks for a vector MAGNITUDE will expect a positive answer. Only vector COMPONENTS can be negative, and components change depending on the coordinate system. You need to know the coordinate system (you need to be given a definite set of axes) to be able to give a vector component as an answer. Some questions may not explicitly say "magnitude" in them, but if they don't give you enough information to calculate a component, then it's implied that they only want the magnitude, which is ALWAYS positive. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here CHECK ANSWER No answer submitted noflinlimited shanks land Scroll to Quest Top Back Contents MacBook ProNo answer submitted CHECK ANSWER 0 of Unlimited checks used Part b (1 points) What is v? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here No answer submitted CHECK ANSWER 0 of Unlimited checks used Part c (1 points) What is u". v? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Enter answer here CHECK ANSWER No answer submitted 0 of Unlimited checks used Scroll to ? Top Question Contents Back0 of Unlimited checks used Question 4 (1 points) (#735346) {Charge Properties, Electrical Properties) A conducting sphere has a net charge of -4.8 x 10 18 C. Calculate the number of excess electrons on the sphere. Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 excess Enter answer here electrons CHECK ANSWER No answer submitted 0 of Unlimited checks usedQuestion 3 (1 points) (#865671) {Charge Properties, Electrical Properties) How many electrons must be removed from a neutral object to leave a net charge of 0.203 MC? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 X 1012 Enter answer here C electrons CHECK ANSWER No answer submitted 0 of Unlimited checks used (1 points)