In addition to stand-alone discussion boards, all of these sites include discussion boards as part of their features except:
a. linkedin.
b. google.
c. yahoo.
d. microsoft windows live.
e. all of these sites include discussion boards.

What happens to the velocity of the car when the upward pull of the cable is greater than the downward pull of gravity as the car rises toward the top?

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.