A very thin ring of radius carries a positive charge uniformly distributed on it. The ring lies in the - plane with its center at the origin. A short uniformly charged rod of length with an identical positive charge is located along at and oriented in the -direction with one end at and the other end at . Both the ring and the rod are insulators, and the charges are fixed in place. For the system consisting of the rod and the ring, find the magnitude and direction of the electric field at the point . Express your symbolic answer in terms of , , , , hati for , hatj for , and hatk for as needed. [Recall that .]

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?

The chart shows the costs and shipping times for materials that a company needs to build a new product. which describes the best trade-off if the company needs to start building their product within the next two years? they should order the domestic materials because it is always best to choose the fastest shipping time. they should order the imported materials because it is always best to choose the lowest cost for materials. since the shipping time is longer, they should order the domestic materials because the additional cost is worth it to get the materials in time. even though the shipping time is longer, they should order the imported materials because they are less expensive and should arrive in plenty of time to build the product.