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Capacitance
Problem 3: Two parallel plates have charges +Q and −Q, as shown. The magnitude of the charges is 29.7nC, the area of each plate is A=0.0105 m2, and the distance between them is d = 8.53cm. The plates are surrounded by air.
Part (f) If the area is doubled to 2A while the gap is decreased to 14d, then what is the value, in picofarads, of the new capacitance?
Part (g) What is the new value, in volts, of potential difference between the plates with the original charges, +Q and −Q, given the increased area and reduced gap of Part (f)?
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- A force, F1, of magnitude 3.3 N and directed due east is exerted on an object. A second force exerted on the object is F2 = 3.3 N, due north. What is the magnitude and direction of the third force, F3, which must be exerted on the object so that the resultant force is zero? A. 4.7 N, 45 degrees N of E. B. 6.6 N, 45 degrees S of W. C. 6.6 N, 45 degrees N of E. D. 4.7, 45 degrees S of W.A rock is thrown straight up into the air with an initial speed of 24 m/s at time t = 0. Ignore air resistance in this problem. At what times does it move with a speed of 12 m/s? Note: There are two answers to this problem.U 9 P . Vector t 9 Match the vectors p, q, 7, 3, and t with one of the combinations of the u and vectors from the graph. S V Р 1 S Q Vector Combination a. 3u - v b. u + v c. 3u d. e. v - 2u
- c) Q: How can you tell from an x-vs-t graph that you have reversed direction?The two insulated wires in (Figure 1) cross at a 30° angle but do not make electrical contact. Each wire carries a 5.0 A current. Points 1 and 2 are each 4.4 cm from the intersection and equally distant from both wires. Part A What is the magnetic field at point 1? Express your answer in microteslas. Enter your answer as positive if the magnetic field is directed into the page and as negative if the magnetic field is directed out of the page. Figure 30A ▸ View Available Hint(s) ΜΕ ΑΣΦ B₁ = Submit Previous Answers X Incorrect; Try Again; 3 attempts remaining Part B ? HT What is the magnetic field at point 2? Express your answer in microteslas. Enter your answer as positive if the magnetic field is directed into the page and as negative if the magnetic field is directed out of the page. View Available Hint(s) B₁ = 0 T Submit Previous Answers 1 of 1 ✓ Correct Provide Feedback FA DHI FB & ( 2 3 4 5 6 7 8 9 W E R T Y U 40 S D F G H J K L P { [ ? X C V B N M H H \ and command option 1315) 12…A force is found to be 172 g . cm/s². Convert this value into units of newtons. N
- An object is dropped from rest from a high altitude and hit the ground later with a final speed of 114 m/s. Find the height (in units of m) from which the object was initially dropped. use g=9.8 m/s². Select one: O A. 1326 OB. 530 OC. 6498 OD. 58 OE. 663A. Express the force F in Cartesian vector notations; if the force F =400 N B. Express the position vector RON in Cartesian vector notation if point N has a coordinates (1,2,0) C. Determine the magnitude of the projection of force along the u axis. F = 600 N A 4 m 4m- y N (1,2,0) Acti Go toQ1. Under what conditions can we have VA = -HoJ? Prove the identity.
