A beam from a flashlight hits a piece of black coal and a piece of metal located 1 m away. The metal appears shiny compared to the coal. Which of the following choices correctly explains how the light interacts with the coal and metal in this situation?

9.98 kg of r-134a at 300 kpa fills a rigid container whose volume is 14 l. determine the temperature and total enthalpy in the container. the container is now heated until the pressure is 600 kpa. determine the temperature and total enthalpy when the heating is completed. use data from the steam tables.