Aclosed system of monatomic ideal gas is taken through a three-step cycle. the system starts in state 1, which has a pressure p and a volume v. then, an expansion at constant pressure occurs (process a), taking the system to state 2, where the volume is 3v. this is followed by process b, an isothermal compression that bring the system to state 3, where the pressure is 3p and the volume returns to v. finally, a constant-volume process (process c) returns the system to state 1. for this problem, take p to be 90.0 kpa and take v to be 6.00 liters. remember that heat is positive when it is added to the system, and negative when it is removed from the system.

(a) calculate the heat in the a process. j
(b) calculate the heat in the b process. j
(c) calculate the heat in the c process. j
(d) calculate the heat in the entire process. j

After a car's engine has been running for a while, if you stand near the car's engine you can often feel heat coming from the engine as a result of a. radiation b. convection c. conduction

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Global climatic patterns are changing because of the melting of polar ice caps. the melting of polar ice caps is an example of the interaction between the atmosphere and cryosphere cryosphere and geosphere hydrosphere and geosphere biosphere and cryosphere