A wire of 80 cm long is bent into a square loop. The wire carries a current of 2.0 A. Then, the loop is immersed in a uniform external magnetic field of magnitude 0.4 T, directed orthogonal to the loop. Determine the magnitude of the magnetic force on each side of the loop due to the uniform external magnetic field. Then, if the plane of the loop is rotated to be parallel to the direction of the uniform external magnetic field, determine the magnitude of the torque on the loop.​

Under conditions for which the same room temperature is maintained by a heating or cooling system, it is not uncommon for a person to feel chilled in the winter but comfortable in the summer. provide a plausible explanation for this situation (with supporting calculations) by considering a room whose air temperature is maintained at 20â°c throughout the year, while the walls of the room are nominally at 27â°c and 14â°c in the summer and winter, respectively. the exposed surface of a person in the room may be assumed to be at a temperature of 32â°c throughout the year and to have an emissivity of 0.90. the coefficient associated with heat transfer by natural convection between the person and the room air is approximately 2 w/m2 â‹…â‹… k. what is the ratio of the thermal resistance due to convection to the thermal resistance due to radiation in the summer? what is the ratio of thermal resistances in the winter

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine