5.00 kg of liquid water is heated to 100.0 °c in a closed system. at this temperature, the density of liquid water is 958 kg/m3. the pressure is maintained at atmospheric pressure of 1.01 × 105 pa. a moveable piston of negligible weight rests on the surface of the water. the water is then converted to steam by adding an additional amount of heat to the system. when all of the water is converted, the final volume of the steam is 8.50 m3. the latent heat of vaporization of water is 2.26 × 106 j/kg. how much heat is added to the system in the isothermal process of converting all of the water into steam?

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

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted