Amarching band consists of rows of musicians walking in straight, even lines. when a marching band performs in an event, such as a parade, and must round a curve in the road, the musician on the outside of the curve must walk around the curve in the same amount of time as the musician on the inside of the curve. this motion can be approximated by a disk rotating at a constant rate about an axis perpendicular to its plane. in this case, the axis of rotation is at the inside of the curve. consider two musicians, alf and beth. beth is four times the distance from the inside of the curve as alf.

knowing that if beth travels a distance s during time δt, how far does alf travel during the same amount of time= (1/4)s

if alf moves with speed v, what is beth's speed? speed in this case means the magnitude of the linear velocity, not the magnitude of the angular velocity.

a)4v b) v c) v/4

What is the difference between electrically neutral objects and electrically charged objects

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

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