Aspring-loaded piston - cylinder device is initially filled with 0.15 lbm of an r-134a liquid-vapor mixture whose temperature is -20°f and whose quality is 75 percent. the spring constant in the spring force relation f = kx° is 40 lbf /in, and the piston diameter is 12 in. the r-134a undergoes a process that increases its volume by 50 percent. calculate the final temperature and enthalpy of the r-134a

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

Can you match these to the correct definition

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light