An ideal gas in a piston-cylinder assembly undergoes two processes in series. During the first process 1-2, from state 1 to state 2, 500 kJ of heat is transferred to the gas while the gas does 800 kJ of work on the piston. The second process, from state 2 to state 3, is a constant pressure compression at 400 kPa during which 450 kJ of heat is lost through the cylinder walls. The internal energy contained in the cylinder gas at states 1 and 3 is 2000 kJ and 3500 kJ, respectively.

Sketch the process on P-V diagram and deternine the total work transfer.

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.