Field due to a long wire: The figure shows two long wires ca…

Field due to a long wire: The figure shows two long wires carrying equal currents I1 and I2 flowing in opposite directions. Which of the arrows labeled A through D correctly represents the direction of the magnetic field due to the wires at a point located at an equal distance d from each wire?

Read the scenario below to determine what type of sampling m…

Read the scenario below to determine what type of sampling method (simple random sample, systematic sample, stratified sample, cluster sample, convenience sample, volunteer sample, or purposive sample) is used in the study.  Provide support from the scenario for your answer. Ninety undergraduate students were recruited for the study via an advertisement in the local student newspaper, flyers posted around campus, and an information table set up towards the entrance of the main library. Of all these recruitment methods, the table set up in the library resulted in securing the most participants. In order to participate in the study, students needed to be over 18 years of age, currently enrolled as undergraduate students, and inexperienced with any type of library instruction at the University. (Mery, DeFrain, Kline & Sult, Evaluating the effectiveness of tools for online database instruction, Communication Information Literacy, 8(1))