Kinetic energy and potential energy#2
1. if each story is 2.50 m high, what is the gravitational potential energy of a 61.2 kg person standing on the
roof of a 10-story building relative to:
a. the tenth floor (15300 j)
b. the sixth floor (9180 j)
c. the first floor (1530 )

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

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.