Three resistors R1 = 81.6 Ω, R2 = 23.7 Ω, R3 = 70.0 Ω, and two batteries 1 = 40.0 V, and 2 = 352 V are connected as shown in the diagram below. What is the current and potential difference across R3?   

The typical American diet contains approximately ___ mgs of sodium.

The best-absorbed iron source is found in which of the following foods?

Intracellular water volume depends primarily on the concentration of

Extra Credit – A circular (flat) coil with N = 310 loops rotates about its diameter with a frequency of 55.0 Hz in a constant magnetic field of 0.800 T.  The area of the loops is 0.150 m2.  Assume that the same coil is acting as a motor and a DC current of 5.00 A is passed through it. NOTE: Answers must include units.   Calculate the following; The max emf generated in the coil is [emf]. The torque when the magnetic field is perpendicular to the plane of the loop as shown in the figure is [T1]. The torque when the loop turns 90° and its plane coincides with the direction of the magnetic field is [T2].

Using the figure below, four long straight wires are perpendicular to the page, and their cross sections from a square of edge length a = 20 cm. The currents are out of the page in wires 1 and 4 and into the page in wires 2 and 3, and each wire carries a current of 20 A. NOTE: Answers must include units, diagrams /drawings and all work/calculations must also be submitted via email to danrodri@fiu.edu by 7:20PM.    Draw the directions of the magnetic field produced from each wire at the center of the square. The magnitude of the net magnetic field at the center of the square is [M1]. The direction of the net magnetic field at the center of the square is [D1]. (ie. up, down, right, left, neither)

Which of the following statements does not describe the role of minerals in the body?

A square loop of wire is pulled upward out of the space between the poles of a magnet, as shown in the figure. As this is done, the current induced in this loop, as viewed from the N pole of the magnet, will be directed;  

The major chloride source in the diet is

A beam of protons is directed horizontally into the region between two bar magnets, as shown in the figure. The magnetic field in this region is horizontal. What is the effect of the magnetic field on the protons?