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

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada