n Figure 10.6, a mass of 81.90 kg is attached to a light string which is wrapped around a cylindrical spool of radius 10 cm and moment of inertia The spool is suspended from the ceiling, and the mass is then released from rest a distance 2.60 m above the floor. How long does it take to reach the floor?

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

Drag each item into the proper state of matter category.

If steel is more dense that lake water, why can a boat float