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a) the electric field between two equally but oppositely charged parallel plates is 2.35 n/c [south]. if a charge of –2.00 c was placed at the midway point between the plates, what force (magnitude and direction) would act on the charge?
give the direction as acting north or south. b) for another set of parallel plates, a charge of –4.00 c experiences a force of 6.00 x 10–3 n [east]. determine the magnitude and direction of the electric field between these plates. give the direction as east or west. (continued) 58 g r a d e 1 2 p h y s i c s assignment 7.4: electric field between the plates of a parallel plate capacitor (continued) d) label each plate in the diagram below with the appropriate polarity according to the information from part (c) above

Classify the following soils according to the uscs classification system. provide appropriate uscs designations. a) this sample of well-graded gravel with sand was obtained from a large earthen dam in vancouver, canada. the sample has 73% fine to coarse sub-angular gravel, 25% fine to coarse sub-angular sand and 2% fines. the maximum size of the particles is 75 mm. the coefficient of curvature is 2.7, while the uniformity coefficient is 12.4. b) this dark brown and wet soil with a “strong organic odor” has 100% passing the no. 200 sieve. the liquid limit of the material is 32% when not dried and is 21% when oven-dried. the plastic index is 21% when not dried. c) this sand has 61% predominantly fine sand, 23% silty fines, and 16% fine sub-rounded gravel size. the maximum size is 20 mm. the liquid limit is 33% and the plastic limit is 27%. d) this soil has 74% fine to coarse sub-angular reddish sand and 26% organic and silty dark brown fines. the liquid limit is 37% when not dried and is 26% when oven dried. the plastic index is 6% when not dried.

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An owl dives toward the ground with a constant velocity of 4.40 m/s at 53.0° below the horizontal. the sun is directly overhead and casts a shadow of the owl directly below it. what is the speed (in m/s) of its shadow on level ground?